Finding the Fourth Proportional to 154,306.31, 212,985.50 and 89,787.98

Step by Step Solution

1. Step 1: Write the proportion equation
   154,306.31 : 212,985.50 = 89,787.98 : x
2. Step 2: Convert to fraction form
   154,306.31/212,985.50 = 89,787.98/x
3. Step 3: Cross multiply
   154,306.31x = 212,985.50 × 89,787.98
4. Step 4: Simplify right side
   154,306.31x = 19,123,536,300.42
5. Step 5: Solve for x
   x = 19,123,536,300.42/154,306.31
6. Step 6: Final answer
   x = 123,932.31