Finding the Fourth Proportional to 1,017.29, 1,403.15 and 662.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.29 : 1,403.15 = 662.56 : x
2. Step 2: Convert to fraction form
   1,017.29/1,403.15 = 662.56/x
3. Step 3: Cross multiply
   1,017.29x = 1,403.15 × 662.56
4. Step 4: Simplify right side
   1,017.29x = 929,671.06
5. Step 5: Solve for x
   x = 929,671.06/1,017.29
6. Step 6: Final answer
   x = 913.87