Finding the Fourth Proportional to 2,169.91, 3,255.20 and 708.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,169.91 : 3,255.20 = 708.72 : x
2. Step 2: Convert to fraction form
   2,169.91/3,255.20 = 708.72/x
3. Step 3: Cross multiply
   2,169.91x = 3,255.20 × 708.72
4. Step 4: Simplify right side
   2,169.91x = 2,307,025.34
5. Step 5: Solve for x
   x = 2,307,025.34/2,169.91
6. Step 6: Final answer
   x = 1,063.19