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Finding the Fourth Proportional to 492,978.76, 739,411 and 138,021.16

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Solution

The fourth proportional to 492,978.76, 739,411 and 138,021.16 is: 207,015.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,978.76 : 739,411 = 138,021.16 : x
  2. Step 2: Convert to fraction form
    492,978.76/739,411 = 138,021.16/x
  3. Step 3: Cross multiply
    492,978.76x = 739,411 × 138,021.16
  4. Step 4: Simplify right side
    492,978.76x = 102,054,363,936.76
  5. Step 5: Solve for x
    x = 102,054,363,936.76/492,978.76
  6. Step 6: Final answer
    x = 207,015.74

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