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Finding the Fourth Proportional to 60,978.35, 91,470.59 and 19,428.59

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Solution

The fourth proportional to 60,978.35, 91,470.59 and 19,428.59 is: 29,143.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,978.35 : 91,470.59 = 19,428.59 : x
  2. Step 2: Convert to fraction form
    60,978.35/91,470.59 = 19,428.59/x
  3. Step 3: Cross multiply
    60,978.35x = 91,470.59 × 19,428.59
  4. Step 4: Simplify right side
    60,978.35x = 1,777,144,035.67
  5. Step 5: Solve for x
    x = 1,777,144,035.67/60,978.35
  6. Step 6: Final answer
    x = 29,143.85

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