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Finding the Fourth Proportional to 620,112.60, 930,168.90 and 407,536.20

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Solution

The fourth proportional to 620,112.60, 930,168.90 and 407,536.20 is: 611,304.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,112.60 : 930,168.90 = 407,536.20 : x
  2. Step 2: Convert to fraction form
    620,112.60/930,168.90 = 407,536.20/x
  3. Step 3: Cross multiply
    620,112.60x = 930,168.90 × 407,536.20
  4. Step 4: Simplify right side
    620,112.60x = 379,077,498,864.18
  5. Step 5: Solve for x
    x = 379,077,498,864.18/620,112.60
  6. Step 6: Final answer
    x = 611,304.30

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