Finding the Fourth Proportional to 8,799.90, 12,142.71 and 5,261.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,799.90 : 12,142.71 = 5,261.82 : x
2. Step 2: Convert to fraction form
   8,799.90/12,142.71 = 5,261.82/x
3. Step 3: Cross multiply
   8,799.90x = 12,142.71 × 5,261.82
4. Step 4: Simplify right side
   8,799.90x = 63,892,754.33
5. Step 5: Solve for x
   x = 63,892,754.33/8,799.90
6. Step 6: Final answer
   x = 7,260.62