Finding the Fourth Proportional to 2,172.27, 3,258.69 and 710.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.27 : 3,258.69 = 710.91 : x
2. Step 2: Convert to fraction form
   2,172.27/3,258.69 = 710.91/x
3. Step 3: Cross multiply
   2,172.27x = 3,258.69 × 710.91
4. Step 4: Simplify right side
   2,172.27x = 2,316,635.31
5. Step 5: Solve for x
   x = 2,316,635.31/2,172.27
6. Step 6: Final answer
   x = 1,066.46