Finding the Fourth Proportional to 5,217.78, 7,200.72 and 2,859.93

Step by Step Solution

1. Step 1: Write the proportion equation
   5,217.78 : 7,200.72 = 2,859.93 : x
2. Step 2: Convert to fraction form
   5,217.78/7,200.72 = 2,859.93/x
3. Step 3: Cross multiply
   5,217.78x = 7,200.72 × 2,859.93
4. Step 4: Simplify right side
   5,217.78x = 20,593,555.15
5. Step 5: Solve for x
   x = 20,593,555.15/5,217.78
6. Step 6: Final answer
   x = 3,946.80