Finding the Fourth Proportional to 5,200.32, 7,180.20 and 3,213.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,200.32 : 7,180.20 = 3,213.60 : x
2. Step 2: Convert to fraction form
   5,200.32/7,180.20 = 3,213.60/x
3. Step 3: Cross multiply
   5,200.32x = 7,180.20 × 3,213.60
4. Step 4: Simplify right side
   5,200.32x = 23,074,290.72
5. Step 5: Solve for x
   x = 23,074,290.72/5,200.32
6. Step 6: Final answer
   x = 4,437.09