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Finding the Fourth Proportional to 78,448.91, 108,260.16 and 42,638.92

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Solution

The fourth proportional to 78,448.91, 108,260.16 and 42,638.92 is: 58,842.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,448.91 : 108,260.16 = 42,638.92 : x
  2. Step 2: Convert to fraction form
    78,448.91/108,260.16 = 42,638.92/x
  3. Step 3: Cross multiply
    78,448.91x = 108,260.16 × 42,638.92
  4. Step 4: Simplify right side
    78,448.91x = 4,616,096,030.78
  5. Step 5: Solve for x
    x = 4,616,096,030.78/78,448.91
  6. Step 6: Final answer
    x = 58,842.07

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