Finding the Third Proportional to 2,128.50 and 2,520

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.50 : 2,520 = 2,520 : x
2. Step 2: Convert to fraction form
   2,128.50/2,520 = 2,520/x
3. Step 3: Cross multiply
   2,128.50x = 2,520 × 2,520
4. Step 4: Simplify right side
   2,128.50x = 6,350,400
5. Step 5: Solve for x
   x = 6,350,400/2,128.50
6. Step 6: Final answer
   x = 2,983.51