Finding the Third Proportional to 1,123.17 and 1,723.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.17 : 1,723.92 = 1,723.92 : x
2. Step 2: Convert to fraction form
   1,123.17/1,723.92 = 1,723.92/x
3. Step 3: Cross multiply
   1,123.17x = 1,723.92 × 1,723.92
4. Step 4: Simplify right side
   1,123.17x = 2,971,906.63
5. Step 5: Solve for x
   x = 2,971,906.63/1,123.17
6. Step 6: Final answer
   x = 2,645.99