Finding the Third Proportional to 156,665.25 and 321,626.25

Step by Step Solution

1. Step 1: Write the proportion equation
   156,665.25 : 321,626.25 = 321,626.25 : x
2. Step 2: Convert to fraction form
   156,665.25/321,626.25 = 321,626.25/x
3. Step 3: Cross multiply
   156,665.25x = 321,626.25 × 321,626.25
4. Step 4: Simplify right side
   156,665.25x = 103,443,444,689.06
5. Step 5: Solve for x
   x = 103,443,444,689.06/156,665.25
6. Step 6: Final answer
   x = 660,283.28