Finding the Fourth Proportional to 90,980.76, 136,471.50 and 31,816.56

Step by Step Solution

1. Step 1: Write the proportion equation
   90,980.76 : 136,471.50 = 31,816.56 : x
2. Step 2: Convert to fraction form
   90,980.76/136,471.50 = 31,816.56/x
3. Step 3: Cross multiply
   90,980.76x = 136,471.50 × 31,816.56
4. Step 4: Simplify right side
   90,980.76x = 4,342,053,668.04
5. Step 5: Solve for x
   x = 4,342,053,668.04/90,980.76
6. Step 6: Final answer
   x = 47,724.97