Finding the Fourth Proportional to 9,101.88, 12,557.76 and 5,561.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,101.88 : 12,557.76 = 5,561.28 : x
2. Step 2: Convert to fraction form
   9,101.88/12,557.76 = 5,561.28/x
3. Step 3: Cross multiply
   9,101.88x = 12,557.76 × 5,561.28
4. Step 4: Simplify right side
   9,101.88x = 69,837,219.53
5. Step 5: Solve for x
   x = 69,837,219.53/9,101.88
6. Step 6: Final answer
   x = 7,672.83