Finding the Fourth Proportional to 5,217.30, 7,808.64 and 3,708.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,217.30 : 7,808.64 = 3,708.72 : x
2. Step 2: Convert to fraction form
   5,217.30/7,808.64 = 3,708.72/x
3. Step 3: Cross multiply
   5,217.30x = 7,808.64 × 3,708.72
4. Step 4: Simplify right side
   5,217.30x = 28,960,059.34
5. Step 5: Solve for x
   x = 28,960,059.34/5,217.30
6. Step 6: Final answer
   x = 5,550.78