Finding the Third Proportional to 1,042.88 and 1,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.88 : 1,520.72 = 1,520.72 : x
2. Step 2: Convert to fraction form
   1,042.88/1,520.72 = 1,520.72/x
3. Step 3: Cross multiply
   1,042.88x = 1,520.72 × 1,520.72
4. Step 4: Simplify right side
   1,042.88x = 2,312,585.52
5. Step 5: Solve for x
   x = 2,312,585.52/1,042.88
6. Step 6: Final answer
   x = 2,217.51