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Finding the Fourth Proportional to 78,780.67, 108,717.67 and 42,971.45

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Solution

The fourth proportional to 78,780.67, 108,717.67 and 42,971.45 is: 59,300.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.67 : 108,717.67 = 42,971.45 : x
  2. Step 2: Convert to fraction form
    78,780.67/108,717.67 = 42,971.45/x
  3. Step 3: Cross multiply
    78,780.67x = 108,717.67 × 42,971.45
  4. Step 4: Simplify right side
    78,780.67x = 4,671,755,705.66
  5. Step 5: Solve for x
    x = 4,671,755,705.66/78,780.67
  6. Step 6: Final answer
    x = 59,300.79

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