Finding the Fourth Proportional to 9,057.98, 12,499.29 and 5,078.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.98 : 12,499.29 = 5,078.22 : x
2. Step 2: Convert to fraction form
   9,057.98/12,499.29 = 5,078.22/x
3. Step 3: Cross multiply
   9,057.98x = 12,499.29 × 5,078.22
4. Step 4: Simplify right side
   9,057.98x = 63,474,144.46
5. Step 5: Solve for x
   x = 63,474,144.46/9,057.98
6. Step 6: Final answer
   x = 7,007.54