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Finding the Fourth Proportional to 78,039.06, 107,694.18 and 42,229.07

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Solution

The fourth proportional to 78,039.06, 107,694.18 and 42,229.07 is: 58,276.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,039.06 : 107,694.18 = 42,229.07 : x
  2. Step 2: Convert to fraction form
    78,039.06/107,694.18 = 42,229.07/x
  3. Step 3: Cross multiply
    78,039.06x = 107,694.18 × 42,229.07
  4. Step 4: Simplify right side
    78,039.06x = 4,547,825,065.81
  5. Step 5: Solve for x
    x = 4,547,825,065.81/78,039.06
  6. Step 6: Final answer
    x = 58,276.27

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