Finding the Third Proportional to 156,215 and 343,150

Step by Step Solution

1. Step 1: Write the proportion equation
   156,215 : 343,150 = 343,150 : x
2. Step 2: Convert to fraction form
   156,215/343,150 = 343,150/x
3. Step 3: Cross multiply
   156,215x = 343,150 × 343,150
4. Step 4: Simplify right side
   156,215x = 117,751,922,500
5. Step 5: Solve for x
   x = 117,751,922,500/156,215
6. Step 6: Final answer
   x = 753,781.15