Finding the Fourth Proportional to 8,799.20, 12,142.88 and 4,820.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,799.20 : 12,142.88 = 4,820.56 : x
2. Step 2: Convert to fraction form
   8,799.20/12,142.88 = 4,820.56/x
3. Step 3: Cross multiply
   8,799.20x = 12,142.88 × 4,820.56
4. Step 4: Simplify right side
   8,799.20x = 58,535,481.61
5. Step 5: Solve for x
   x = 58,535,481.61/8,799.20
6. Step 6: Final answer
   x = 6,652.36