Finding the Fourth Proportional to 16,787.88, 23,159.48 and 13,435.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,787.88 : 23,159.48 = 13,435.42 : x
2. Step 2: Convert to fraction form
   16,787.88/23,159.48 = 13,435.42/x
3. Step 3: Cross multiply
   16,787.88x = 23,159.48 × 13,435.42
4. Step 4: Simplify right side
   16,787.88x = 311,157,340.78
5. Step 5: Solve for x
   x = 311,157,340.78/16,787.88
6. Step 6: Final answer
   x = 18,534.64