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Finding the Fourth Proportional to 12,978, 19,467.36 and 3,744

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Solution

The fourth proportional to 12,978, 19,467.36 and 3,744 is: 5,616.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978 : 19,467.36 = 3,744 : x
  2. Step 2: Convert to fraction form
    12,978/19,467.36 = 3,744/x
  3. Step 3: Cross multiply
    12,978x = 19,467.36 × 3,744
  4. Step 4: Simplify right side
    12,978x = 72,885,795.84
  5. Step 5: Solve for x
    x = 72,885,795.84/12,978
  6. Step 6: Final answer
    x = 5,616.10

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