Finding the Third Proportional to 1,243.27 and 1,439.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.27 : 1,439.86 = 1,439.86 : x
2. Step 2: Convert to fraction form
   1,243.27/1,439.86 = 1,439.86/x
3. Step 3: Cross multiply
   1,243.27x = 1,439.86 × 1,439.86
4. Step 4: Simplify right side
   1,243.27x = 2,073,195.02
5. Step 5: Solve for x
   x = 2,073,195.02/1,243.27
6. Step 6: Final answer
   x = 1,667.54