Finding the Fourth Proportional to 8,799.31, 12,143.34 and 4,820.65

Step by Step Solution

1. Step 1: Write the proportion equation
   8,799.31 : 12,143.34 = 4,820.65 : x
2. Step 2: Convert to fraction form
   8,799.31/12,143.34 = 4,820.65/x
3. Step 3: Cross multiply
   8,799.31x = 12,143.34 × 4,820.65
4. Step 4: Simplify right side
   8,799.31x = 58,538,731.25
5. Step 5: Solve for x
   x = 58,538,731.25/8,799.31
6. Step 6: Final answer
   x = 6,652.65