Finding the Fourth Proportional to 10,086.89, 13,920.25 and 5,549.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,086.89 : 13,920.25 = 5,549.76 : x
2. Step 2: Convert to fraction form
   10,086.89/13,920.25 = 5,549.76/x
3. Step 3: Cross multiply
   10,086.89x = 13,920.25 × 5,549.76
4. Step 4: Simplify right side
   10,086.89x = 77,254,018.89
5. Step 5: Solve for x
   x = 77,254,018.89/10,086.89
6. Step 6: Final answer
   x = 7,658.85