Finding the Fourth Proportional to 9,087.31, 12,539.91 and 5,549.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,087.31 : 12,539.91 = 5,549.77 : x
2. Step 2: Convert to fraction form
   9,087.31/12,539.91 = 5,549.77/x
3. Step 3: Cross multiply
   9,087.31x = 12,539.91 × 5,549.77
4. Step 4: Simplify right side
   9,087.31x = 69,593,616.32
5. Step 5: Solve for x
   x = 69,593,616.32/9,087.31
6. Step 6: Final answer
   x = 7,658.33