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Finding the Fourth Proportional to 666,408.42, 919,415.88 and 379,721.88

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Solution

The fourth proportional to 666,408.42, 919,415.88 and 379,721.88 is: 523,886.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,408.42 : 919,415.88 = 379,721.88 : x
  2. Step 2: Convert to fraction form
    666,408.42/919,415.88 = 379,721.88/x
  3. Step 3: Cross multiply
    666,408.42x = 919,415.88 × 379,721.88
  4. Step 4: Simplify right side
    666,408.42x = 349,122,326,455.45
  5. Step 5: Solve for x
    x = 349,122,326,455.45/666,408.42
  6. Step 6: Final answer
    x = 523,886.43

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