Finding the Fourth Proportional to 1,002.72, 1,502.40 and 655.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.72 : 1,502.40 = 655.62 : x
2. Step 2: Convert to fraction form
   1,002.72/1,502.40 = 655.62/x
3. Step 3: Cross multiply
   1,002.72x = 1,502.40 × 655.62
4. Step 4: Simplify right side
   1,002.72x = 985,003.49
5. Step 5: Solve for x
   x = 985,003.49/1,002.72
6. Step 6: Final answer
   x = 982.33