Finding the Third Proportional to 156,674.50 and 321,644

Step by Step Solution

1. Step 1: Write the proportion equation
   156,674.50 : 321,644 = 321,644 : x
2. Step 2: Convert to fraction form
   156,674.50/321,644 = 321,644/x
3. Step 3: Cross multiply
   156,674.50x = 321,644 × 321,644
4. Step 4: Simplify right side
   156,674.50x = 103,454,862,736
5. Step 5: Solve for x
   x = 103,454,862,736/156,674.50
6. Step 6: Final answer
   x = 660,317.17