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Finding the Fourth Proportional to 129,779.70, 194,669.55 and 79,697.40

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Solution

The fourth proportional to 129,779.70, 194,669.55 and 79,697.40 is: 119,546.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,779.70 : 194,669.55 = 79,697.40 : x
  2. Step 2: Convert to fraction form
    129,779.70/194,669.55 = 79,697.40/x
  3. Step 3: Cross multiply
    129,779.70x = 194,669.55 × 79,697.40
  4. Step 4: Simplify right side
    129,779.70x = 15,514,656,994.17
  5. Step 5: Solve for x
    x = 15,514,656,994.17/129,779.70
  6. Step 6: Final answer
    x = 119,546.10

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