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Finding the Fourth Proportional to 315,202,978.20, 472,166,738.10 and 218,268,139.80

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Solution

The fourth proportional to 315,202,978.20, 472,166,738.10 and 218,268,139.80 is: 326,960,602.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,202,978.20 : 472,166,738.10 = 218,268,139.80 : x
  2. Step 2: Convert to fraction form
    315,202,978.20/472,166,738.10 = 218,268,139.80/x
  3. Step 3: Cross multiply
    315,202,978.20x = 472,166,738.10 × 218,268,139.80
  4. Step 4: Simplify right side
    315,202,978.20x = 103,058,955,600,520,800
  5. Step 5: Solve for x
    x = 103,058,955,600,520,800/315,202,978.20
  6. Step 6: Final answer
    x = 326,960,602.30

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