Finding the Fourth Proportional to 8,799.30, 12,142.98 and 4,820.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,799.30 : 12,142.98 = 4,820.40 : x
2. Step 2: Convert to fraction form
   8,799.30/12,142.98 = 4,820.40/x
3. Step 3: Cross multiply
   8,799.30x = 12,142.98 × 4,820.40
4. Step 4: Simplify right side
   8,799.30x = 58,534,020.79
5. Step 5: Solve for x
   x = 58,534,020.79/8,799.30
6. Step 6: Final answer
   x = 6,652.12