Finding the Fourth Proportional to 209,152.50, 288,632.29 and 113,659.20

Step by Step Solution

1. Step 1: Write the proportion equation
   209,152.50 : 288,632.29 = 113,659.20 : x
2. Step 2: Convert to fraction form
   209,152.50/288,632.29 = 113,659.20/x
3. Step 3: Cross multiply
   209,152.50x = 288,632.29 × 113,659.20
4. Step 4: Simplify right side
   209,152.50x = 32,805,714,784.86
5. Step 5: Solve for x
   x = 32,805,714,784.86/209,152.50
6. Step 6: Final answer
   x = 156,850.69