Finding the Third Proportional to 156,949 and 322,160

Step by Step Solution

1. Step 1: Write the proportion equation
   156,949 : 322,160 = 322,160 : x
2. Step 2: Convert to fraction form
   156,949/322,160 = 322,160/x
3. Step 3: Cross multiply
   156,949x = 322,160 × 322,160
4. Step 4: Simplify right side
   156,949x = 103,787,065,600
5. Step 5: Solve for x
   x = 103,787,065,600/156,949
6. Step 6: Final answer
   x = 661,278.92