Finding the Fourth Proportional to 8,799.91, 12,143.76 and 4,820.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,799.91 : 12,143.76 = 4,820.78 : x
2. Step 2: Convert to fraction form
   8,799.91/12,143.76 = 4,820.78/x
3. Step 3: Cross multiply
   8,799.91x = 12,143.76 × 4,820.78
4. Step 4: Simplify right side
   8,799.91x = 58,542,395.33
5. Step 5: Solve for x
   x = 58,542,395.33/8,799.91
6. Step 6: Final answer
   x = 6,652.61