Finding the Fourth Proportional to 271,308.30, 407,020.76 and 91,411.61

Step by Step Solution

1. Step 1: Write the proportion equation
   271,308.30 : 407,020.76 = 91,411.61 : x
2. Step 2: Convert to fraction form
   271,308.30/407,020.76 = 91,411.61/x
3. Step 3: Cross multiply
   271,308.30x = 407,020.76 × 91,411.61
4. Step 4: Simplify right side
   271,308.30x = 37,206,420,482.86
5. Step 5: Solve for x
   x = 37,206,420,482.86/271,308.30
6. Step 6: Final answer
   x = 137,137.05