Finding the Fourth Proportional to 9,090.31, 12,544.50 and 5,057.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.31 : 12,544.50 = 5,057.10 : x
2. Step 2: Convert to fraction form
   9,090.31/12,544.50 = 5,057.10/x
3. Step 3: Cross multiply
   9,090.31x = 12,544.50 × 5,057.10
4. Step 4: Simplify right side
   9,090.31x = 63,438,790.95
5. Step 5: Solve for x
   x = 63,438,790.95/9,090.31
6. Step 6: Final answer
   x = 6,978.73