Finding the Third Proportional to 651 and 1,048.31

Step by Step Solution

1. Step 1: Write the proportion equation
   651 : 1,048.31 = 1,048.31 : x
2. Step 2: Convert to fraction form
   651/1,048.31 = 1,048.31/x
3. Step 3: Cross multiply
   651x = 1,048.31 × 1,048.31
4. Step 4: Simplify right side
   651x = 1,098,959.10
5. Step 5: Solve for x
   x = 1,098,959.10/651
6. Step 6: Final answer
   x = 1,688.11