Finding the Fourth Proportional to 8,796.32, 12,139.20 and 5,656.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,796.32 : 12,139.20 = 5,656.80 : x
2. Step 2: Convert to fraction form
   8,796.32/12,139.20 = 5,656.80/x
3. Step 3: Cross multiply
   8,796.32x = 12,139.20 × 5,656.80
4. Step 4: Simplify right side
   8,796.32x = 68,669,026.56
5. Step 5: Solve for x
   x = 68,669,026.56/8,796.32
6. Step 6: Final answer
   x = 7,806.56