Finding the Fourth Proportional to 113,587.50, 170,272.76 and 42,490.86

Step by Step Solution

1. Step 1: Write the proportion equation
   113,587.50 : 170,272.76 = 42,490.86 : x
2. Step 2: Convert to fraction form
   113,587.50/170,272.76 = 42,490.86/x
3. Step 3: Cross multiply
   113,587.50x = 170,272.76 × 42,490.86
4. Step 4: Simplify right side
   113,587.50x = 7,235,035,794.52
5. Step 5: Solve for x
   x = 7,235,035,794.52/113,587.50
6. Step 6: Final answer
   x = 63,695.70