Finding the Fourth Proportional to 2,172.69, 3,258.29 and 711.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.69 : 3,258.29 = 711.48 : x
2. Step 2: Convert to fraction form
   2,172.69/3,258.29 = 711.48/x
3. Step 3: Cross multiply
   2,172.69x = 3,258.29 × 711.48
4. Step 4: Simplify right side
   2,172.69x = 2,318,222.17
5. Step 5: Solve for x
   x = 2,318,222.17/2,172.69
6. Step 6: Final answer
   x = 1,066.98