Finding the Fourth Proportional to 8,787.64, 12,123.42 and 5,600.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,787.64 : 12,123.42 = 5,600.09 : x
2. Step 2: Convert to fraction form
   8,787.64/12,123.42 = 5,600.09/x
3. Step 3: Cross multiply
   8,787.64x = 12,123.42 × 5,600.09
4. Step 4: Simplify right side
   8,787.64x = 67,892,215.72
5. Step 5: Solve for x
   x = 67,892,215.72/8,787.64
6. Step 6: Final answer
   x = 7,725.88