Finding the Fourth Proportional to 113,787.68, 170,554.34 and 42,641.86

Step by Step Solution

1. Step 1: Write the proportion equation
   113,787.68 : 170,554.34 = 42,641.86 : x
2. Step 2: Convert to fraction form
   113,787.68/170,554.34 = 42,641.86/x
3. Step 3: Cross multiply
   113,787.68x = 170,554.34 × 42,641.86
4. Step 4: Simplify right side
   113,787.68x = 7,272,754,288.67
5. Step 5: Solve for x
   x = 7,272,754,288.67/113,787.68
6. Step 6: Final answer
   x = 63,915.13