Finding the Fourth Proportional to 1,017.68, 1,403.16 and 722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.68 : 1,403.16 = 722.72 : x
2. Step 2: Convert to fraction form
   1,017.68/1,403.16 = 722.72/x
3. Step 3: Cross multiply
   1,017.68x = 1,403.16 × 722.72
4. Step 4: Simplify right side
   1,017.68x = 1,014,091.80
5. Step 5: Solve for x
   x = 1,014,091.80/1,017.68
6. Step 6: Final answer
   x = 996.47