Finding the Third Proportional to 2,128.50 and 3,118.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.50 : 3,118.13 = 3,118.13 : x
2. Step 2: Convert to fraction form
   2,128.50/3,118.13 = 3,118.13/x
3. Step 3: Cross multiply
   2,128.50x = 3,118.13 × 3,118.13
4. Step 4: Simplify right side
   2,128.50x = 9,722,703.52
5. Step 5: Solve for x
   x = 9,722,703.52/2,128.50
6. Step 6: Final answer
   x = 4,567.87