Finding the Fourth Proportional to 9,086.11, 12,539.15 and 5,107.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,086.11 : 12,539.15 = 5,107.15 : x
2. Step 2: Convert to fraction form
   9,086.11/12,539.15 = 5,107.15/x
3. Step 3: Cross multiply
   9,086.11x = 12,539.15 × 5,107.15
4. Step 4: Simplify right side
   9,086.11x = 64,039,319.92
5. Step 5: Solve for x
   x = 64,039,319.92/9,086.11
6. Step 6: Final answer
   x = 7,048.05