Finding the Fourth Proportional to 2,179.15, 3,269.10 and 718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.15 : 3,269.10 = 718.72 : x
2. Step 2: Convert to fraction form
   2,179.15/3,269.10 = 718.72/x
3. Step 3: Cross multiply
   2,179.15x = 3,269.10 × 718.72
4. Step 4: Simplify right side
   2,179.15x = 2,349,567.55
5. Step 5: Solve for x
   x = 2,349,567.55/2,179.15
6. Step 6: Final answer
   x = 1,078.20