Finding the Fourth Proportional to 1,445.33, 2,166.17 and 714.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.33 : 2,166.17 = 714.71 : x
2. Step 2: Convert to fraction form
   1,445.33/2,166.17 = 714.71/x
3. Step 3: Cross multiply
   1,445.33x = 2,166.17 × 714.71
4. Step 4: Simplify right side
   1,445.33x = 1,548,168.96
5. Step 5: Solve for x
   x = 1,548,168.96/1,445.33
6. Step 6: Final answer
   x = 1,071.16