Finding the Fourth Proportional to 90,891.92, 136,400.17 and 31,727.59

Step by Step Solution

1. Step 1: Write the proportion equation
   90,891.92 : 136,400.17 = 31,727.59 : x
2. Step 2: Convert to fraction form
   90,891.92/136,400.17 = 31,727.59/x
3. Step 3: Cross multiply
   90,891.92x = 136,400.17 × 31,727.59
4. Step 4: Simplify right side
   90,891.92x = 4,327,648,669.69
5. Step 5: Solve for x
   x = 4,327,648,669.69/90,891.92
6. Step 6: Final answer
   x = 47,613.13