Finding the Fourth Proportional to 90,452.50, 136,499.58 and 87,437.58

Step by Step Solution

1. Step 1: Write the proportion equation
   90,452.50 : 136,499.58 = 87,437.58 : x
2. Step 2: Convert to fraction form
   90,452.50/136,499.58 = 87,437.58/x
3. Step 3: Cross multiply
   90,452.50x = 136,499.58 × 87,437.58
4. Step 4: Simplify right side
   90,452.50x = 11,935,192,434.34
5. Step 5: Solve for x
   x = 11,935,192,434.34/90,452.50
6. Step 6: Final answer
   x = 131,949.84