Finding the Fourth Proportional to 8,976.42, 12,385.98 and 5,200.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,976.42 : 12,385.98 = 5,200.20 : x
2. Step 2: Convert to fraction form
   8,976.42/12,385.98 = 5,200.20/x
3. Step 3: Cross multiply
   8,976.42x = 12,385.98 × 5,200.20
4. Step 4: Simplify right side
   8,976.42x = 64,409,573.20
5. Step 5: Solve for x
   x = 64,409,573.20/8,976.42
6. Step 6: Final answer
   x = 7,175.42