Finding the Fourth Proportional to 8,842.34, 12,200.20 and 5,257.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,842.34 : 12,200.20 = 5,257.10 : x
2. Step 2: Convert to fraction form
   8,842.34/12,200.20 = 5,257.10/x
3. Step 3: Cross multiply
   8,842.34x = 12,200.20 × 5,257.10
4. Step 4: Simplify right side
   8,842.34x = 64,137,610.42
5. Step 5: Solve for x
   x = 64,137,610.42/8,842.34
6. Step 6: Final answer
   x = 7,253.47