Finding the Fourth Proportional to 9,131.20, 13,686.42 and 3,862.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.20 : 13,686.42 = 3,862.93 : x
2. Step 2: Convert to fraction form
   9,131.20/13,686.42 = 3,862.93/x
3. Step 3: Cross multiply
   9,131.20x = 13,686.42 × 3,862.93
4. Step 4: Simplify right side
   9,131.20x = 52,869,688.34
5. Step 5: Solve for x
   x = 52,869,688.34/9,131.20
6. Step 6: Final answer
   x = 5,790.00