Finding the Third Proportional to 1,128.94 and 2,108.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.94 : 2,108.53 = 2,108.53 : x
2. Step 2: Convert to fraction form
   1,128.94/2,108.53 = 2,108.53/x
3. Step 3: Cross multiply
   1,128.94x = 2,108.53 × 2,108.53
4. Step 4: Simplify right side
   1,128.94x = 4,445,904.03
5. Step 5: Solve for x
   x = 4,445,904.03/1,128.94
6. Step 6: Final answer
   x = 3,938.13