Finding the Fourth Proportional to 9,028.72, 12,454.86 and 5,489.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,028.72 : 12,454.86 = 5,489.56 : x
2. Step 2: Convert to fraction form
   9,028.72/12,454.86 = 5,489.56/x
3. Step 3: Cross multiply
   9,028.72x = 12,454.86 × 5,489.56
4. Step 4: Simplify right side
   9,028.72x = 68,371,701.26
5. Step 5: Solve for x
   x = 68,371,701.26/9,028.72
6. Step 6: Final answer
   x = 7,572.69