Finding the Fourth Proportional to 8,796.80, 12,139.23 and 5,259.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,796.80 : 12,139.23 = 5,259.32 : x
2. Step 2: Convert to fraction form
   8,796.80/12,139.23 = 5,259.32/x
3. Step 3: Cross multiply
   8,796.80x = 12,139.23 × 5,259.32
4. Step 4: Simplify right side
   8,796.80x = 63,844,095.12
5. Step 5: Solve for x
   x = 63,844,095.12/8,796.80
6. Step 6: Final answer
   x = 7,257.65