Finding the Fourth Proportional to 5,957.60, 8,216.72 and 3,715.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,957.60 : 8,216.72 = 3,715.20 : x
2. Step 2: Convert to fraction form
   5,957.60/8,216.72 = 3,715.20/x
3. Step 3: Cross multiply
   5,957.60x = 8,216.72 × 3,715.20
4. Step 4: Simplify right side
   5,957.60x = 30,526,758.14
5. Step 5: Solve for x
   x = 30,526,758.14/5,957.60
6. Step 6: Final answer
   x = 5,124.00