Finding the Fourth Proportional to 2,179.55, 3,269.46 and 718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.55 : 3,269.46 = 718.72 : x
2. Step 2: Convert to fraction form
   2,179.55/3,269.46 = 718.72/x
3. Step 3: Cross multiply
   2,179.55x = 3,269.46 × 718.72
4. Step 4: Simplify right side
   2,179.55x = 2,349,820.81
5. Step 5: Solve for x
   x = 2,349,820.81/2,179.55
6. Step 6: Final answer
   x = 1,078.12