Finding the Fourth Proportional to 8,129.31, 12,192.71 and 2,581.93

Step by Step Solution

1. Step 1: Write the proportion equation
   8,129.31 : 12,192.71 = 2,581.93 : x
2. Step 2: Convert to fraction form
   8,129.31/12,192.71 = 2,581.93/x
3. Step 3: Cross multiply
   8,129.31x = 12,192.71 × 2,581.93
4. Step 4: Simplify right side
   8,129.31x = 31,480,723.73
5. Step 5: Solve for x
   x = 31,480,723.73/8,129.31
6. Step 6: Final answer
   x = 3,872.50