Finding the Fourth Proportional to 1,002.96, 1,512.18 and 996.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.96 : 1,512.18 = 996.72 : x
2. Step 2: Convert to fraction form
   1,002.96/1,512.18 = 996.72/x
3. Step 3: Cross multiply
   1,002.96x = 1,512.18 × 996.72
4. Step 4: Simplify right side
   1,002.96x = 1,507,220.05
5. Step 5: Solve for x
   x = 1,507,220.05/1,002.96
6. Step 6: Final answer
   x = 1,502.77