Finding the Fourth Proportional to 8,128.70, 12,200.16 and 5,347.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,128.70 : 12,200.16 = 5,347.52 : x
2. Step 2: Convert to fraction form
   8,128.70/12,200.16 = 5,347.52/x
3. Step 3: Cross multiply
   8,128.70x = 12,200.16 × 5,347.52
4. Step 4: Simplify right side
   8,128.70x = 65,240,599.60
5. Step 5: Solve for x
   x = 65,240,599.60/8,128.70
6. Step 6: Final answer
   x = 8,025.96