Finding the Fourth Proportional to 235,616.50, 325,150.78 and 129,632.50

Step by Step Solution

1. Step 1: Write the proportion equation
   235,616.50 : 325,150.78 = 129,632.50 : x
2. Step 2: Convert to fraction form
   235,616.50/325,150.78 = 129,632.50/x
3. Step 3: Cross multiply
   235,616.50x = 325,150.78 × 129,632.50
4. Step 4: Simplify right side
   235,616.50x = 42,150,108,488.35
5. Step 5: Solve for x
   x = 42,150,108,488.35/235,616.50
6. Step 6: Final answer
   x = 178,892.86