Finding the Fourth Proportional to 113,790.42, 170,558.46 and 42,644.61

Step by Step Solution

1. Step 1: Write the proportion equation
   113,790.42 : 170,558.46 = 42,644.61 : x
2. Step 2: Convert to fraction form
   113,790.42/170,558.46 = 42,644.61/x
3. Step 3: Cross multiply
   113,790.42x = 170,558.46 × 42,644.61
4. Step 4: Simplify right side
   113,790.42x = 7,273,399,008.90
5. Step 5: Solve for x
   x = 7,273,399,008.90/113,790.42
6. Step 6: Final answer
   x = 63,919.26