Finding the Fourth Proportional to 8,799.79, 12,139.10 and 5,441.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,799.79 : 12,139.10 = 5,441.53 : x
2. Step 2: Convert to fraction form
   8,799.79/12,139.10 = 5,441.53/x
3. Step 3: Cross multiply
   8,799.79x = 12,139.10 × 5,441.53
4. Step 4: Simplify right side
   8,799.79x = 66,055,276.82
5. Step 5: Solve for x
   x = 66,055,276.82/8,799.79
6. Step 6: Final answer
   x = 7,506.46