Finding the Fourth Proportional to 8,857.31, 12,222.96 and 4,878.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,857.31 : 12,222.96 = 4,878.43 : x
2. Step 2: Convert to fraction form
   8,857.31/12,222.96 = 4,878.43/x
3. Step 3: Cross multiply
   8,857.31x = 12,222.96 × 4,878.43
4. Step 4: Simplify right side
   8,857.31x = 59,628,824.20
5. Step 5: Solve for x
   x = 59,628,824.20/8,857.31
6. Step 6: Final answer
   x = 6,732.16