Finding the Fourth Proportional to 5,718.53, 7,892.33 and 3,200.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,718.53 : 7,892.33 = 3,200.78 : x
2. Step 2: Convert to fraction form
   5,718.53/7,892.33 = 3,200.78/x
3. Step 3: Cross multiply
   5,718.53x = 7,892.33 × 3,200.78
4. Step 4: Simplify right side
   5,718.53x = 25,261,556.55
5. Step 5: Solve for x
   x = 25,261,556.55/5,718.53
6. Step 6: Final answer
   x = 4,417.50