Finding the Fourth Proportional to 1,111.14, 1,532.39 and 717.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.14 : 1,532.39 = 717.75 : x
2. Step 2: Convert to fraction form
   1,111.14/1,532.39 = 717.75/x
3. Step 3: Cross multiply
   1,111.14x = 1,532.39 × 717.75
4. Step 4: Simplify right side
   1,111.14x = 1,099,869.33
5. Step 5: Solve for x
   x = 1,099,869.33/1,111.14
6. Step 6: Final answer
   x = 989.86