Finding the Fourth Proportional to 9,810.88, 13,539.68 and 5,561.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,810.88 : 13,539.68 = 5,561.89 : x
2. Step 2: Convert to fraction form
   9,810.88/13,539.68 = 5,561.89/x
3. Step 3: Cross multiply
   9,810.88x = 13,539.68 × 5,561.89
4. Step 4: Simplify right side
   9,810.88x = 75,306,210.80
5. Step 5: Solve for x
   x = 75,306,210.80/9,810.88
6. Step 6: Final answer
   x = 7,675.79