Finding the Third Proportional to 156,939 and 322,146

Step by Step Solution

1. Step 1: Write the proportion equation
   156,939 : 322,146 = 322,146 : x
2. Step 2: Convert to fraction form
   156,939/322,146 = 322,146/x
3. Step 3: Cross multiply
   156,939x = 322,146 × 322,146
4. Step 4: Simplify right side
   156,939x = 103,778,045,316
5. Step 5: Solve for x
   x = 103,778,045,316/156,939
6. Step 6: Final answer
   x = 661,263.58