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Finding the Fourth Proportional to 36,978, 55,467 and 12,354

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Solution

The fourth proportional to 36,978, 55,467 and 12,354 is: 18,531

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,978 : 55,467 = 12,354 : x
  2. Step 2: Convert to fraction form
    36,978/55,467 = 12,354/x
  3. Step 3: Cross multiply
    36,978x = 55,467 × 12,354
  4. Step 4: Simplify right side
    36,978x = 685,239,318
  5. Step 5: Solve for x
    x = 685,239,318/36,978
  6. Step 6: Final answer
    x = 18,531

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