Finding the Fourth Proportional to 154,200.72, 231,143.52 and 87,499.98

Step by Step Solution

1. Step 1: Write the proportion equation
   154,200.72 : 231,143.52 = 87,499.98 : x
2. Step 2: Convert to fraction form
   154,200.72/231,143.52 = 87,499.98/x
3. Step 3: Cross multiply
   154,200.72x = 231,143.52 × 87,499.98
4. Step 4: Simplify right side
   154,200.72x = 20,225,053,377.13
5. Step 5: Solve for x
   x = 20,225,053,377.13/154,200.72
6. Step 6: Final answer
   x = 131,160.56