Finding the Third Proportional to 156,973 and 343,105

Step by Step Solution

1. Step 1: Write the proportion equation
   156,973 : 343,105 = 343,105 : x
2. Step 2: Convert to fraction form
   156,973/343,105 = 343,105/x
3. Step 3: Cross multiply
   156,973x = 343,105 × 343,105
4. Step 4: Simplify right side
   156,973x = 117,721,041,025
5. Step 5: Solve for x
   x = 117,721,041,025/156,973
6. Step 6: Final answer
   x = 749,944.52