Finding the Fourth Proportional to 9,249.06, 12,763.65 and 5,057.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,249.06 : 12,763.65 = 5,057.31 : x
2. Step 2: Convert to fraction form
   9,249.06/12,763.65 = 5,057.31/x
3. Step 3: Cross multiply
   9,249.06x = 12,763.65 × 5,057.31
4. Step 4: Simplify right side
   9,249.06x = 64,549,734.78
5. Step 5: Solve for x
   x = 64,549,734.78/9,249.06
6. Step 6: Final answer
   x = 6,979.06