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Finding the Fourth Proportional to 78,872.04, 118,308.30 and 19,707.72

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Solution

The fourth proportional to 78,872.04, 118,308.30 and 19,707.72 is: 29,561.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,872.04 : 118,308.30 = 19,707.72 : x
  2. Step 2: Convert to fraction form
    78,872.04/118,308.30 = 19,707.72/x
  3. Step 3: Cross multiply
    78,872.04x = 118,308.30 × 19,707.72
  4. Step 4: Simplify right side
    78,872.04x = 2,331,586,850.08
  5. Step 5: Solve for x
    x = 2,331,586,850.08/78,872.04
  6. Step 6: Final answer
    x = 29,561.64

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