Finding the Fourth Proportional to 9,131.64, 13,687.10 and 3,863.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.64 : 13,687.10 = 3,863.37 : x
2. Step 2: Convert to fraction form
   9,131.64/13,687.10 = 3,863.37/x
3. Step 3: Cross multiply
   9,131.64x = 13,687.10 × 3,863.37
4. Step 4: Simplify right side
   9,131.64x = 52,878,260.88
5. Step 5: Solve for x
   x = 52,878,260.88/9,131.64
6. Step 6: Final answer
   x = 5,790.66