Finding the Fourth Proportional to 9,057.56, 12,500.52 and 5,521.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.56 : 12,500.52 = 5,521.28 : x
2. Step 2: Convert to fraction form
   9,057.56/12,500.52 = 5,521.28/x
3. Step 3: Cross multiply
   9,057.56x = 12,500.52 × 5,521.28
4. Step 4: Simplify right side
   9,057.56x = 69,018,871.07
5. Step 5: Solve for x
   x = 69,018,871.07/9,057.56
6. Step 6: Final answer
   x = 7,620.03