Finding the Fourth Proportional to 14,787.38, 20,405.71 and 8,499.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,787.38 : 20,405.71 = 8,499.76 : x
2. Step 2: Convert to fraction form
   14,787.38/20,405.71 = 8,499.76/x
3. Step 3: Cross multiply
   14,787.38x = 20,405.71 × 8,499.76
4. Step 4: Simplify right side
   14,787.38x = 173,443,637.63
5. Step 5: Solve for x
   x = 173,443,637.63/14,787.38
6. Step 6: Final answer
   x = 11,729.17