Finding the Third Proportional to 1,112.72 and 1,729.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.72 : 1,729.78 = 1,729.78 : x
2. Step 2: Convert to fraction form
   1,112.72/1,729.78 = 1,729.78/x
3. Step 3: Cross multiply
   1,112.72x = 1,729.78 × 1,729.78
4. Step 4: Simplify right side
   1,112.72x = 2,992,143.17
5. Step 5: Solve for x
   x = 2,992,143.17/1,112.72
6. Step 6: Final answer
   x = 2,689.04