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Finding the Fourth Proportional to 7,109.78, 10,666.23 and 2,179.79

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Solution

The fourth proportional to 7,109.78, 10,666.23 and 2,179.79 is: 3,270.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,109.78 : 10,666.23 = 2,179.79 : x
  2. Step 2: Convert to fraction form
    7,109.78/10,666.23 = 2,179.79/x
  3. Step 3: Cross multiply
    7,109.78x = 10,666.23 × 2,179.79
  4. Step 4: Simplify right side
    7,109.78x = 23,250,141.49
  5. Step 5: Solve for x
    x = 23,250,141.49/7,109.78
  6. Step 6: Final answer
    x = 3,270.16

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