Finding the Third Proportional to 672.38 and 1,038.56

Step by Step Solution

1. Step 1: Write the proportion equation
   672.38 : 1,038.56 = 1,038.56 : x
2. Step 2: Convert to fraction form
   672.38/1,038.56 = 1,038.56/x
3. Step 3: Cross multiply
   672.38x = 1,038.56 × 1,038.56
4. Step 4: Simplify right side
   672.38x = 1,078,612.07
5. Step 5: Solve for x
   x = 1,078,612.07/672.38
6. Step 6: Final answer
   x = 1,604.18