Finding the Fourth Proportional to 1,066.52, 1,471.36 and 717.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.52 : 1,471.36 = 717.32 : x
2. Step 2: Convert to fraction form
   1,066.52/1,471.36 = 717.32/x
3. Step 3: Cross multiply
   1,066.52x = 1,471.36 × 717.32
4. Step 4: Simplify right side
   1,066.52x = 1,055,435.96
5. Step 5: Solve for x
   x = 1,055,435.96/1,066.52
6. Step 6: Final answer
   x = 989.61