Finding the Fourth Proportional to 90,816.72, 136,287.72 and 31,652.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90,816.72 : 136,287.72 = 31,652.88 : x
2. Step 2: Convert to fraction form
   90,816.72/136,287.72 = 31,652.88/x
3. Step 3: Cross multiply
   90,816.72x = 136,287.72 × 31,652.88
4. Step 4: Simplify right side
   90,816.72x = 4,313,898,846.63
5. Step 5: Solve for x
   x = 4,313,898,846.63/90,816.72
6. Step 6: Final answer
   x = 47,501.15