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Finding the Fourth Proportional to 12,787.70, 19,187.42 and 5,769.59

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Solution

The fourth proportional to 12,787.70, 19,187.42 and 5,769.59 is: 8,657.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.70 : 19,187.42 = 5,769.59 : x
  2. Step 2: Convert to fraction form
    12,787.70/19,187.42 = 5,769.59/x
  3. Step 3: Cross multiply
    12,787.70x = 19,187.42 × 5,769.59
  4. Step 4: Simplify right side
    12,787.70x = 110,703,421.77
  5. Step 5: Solve for x
    x = 110,703,421.77/12,787.70
  6. Step 6: Final answer
    x = 8,657.03

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