Finding the Third Proportional to 156,738 and 343,520

Step by Step Solution

1. Step 1: Write the proportion equation
   156,738 : 343,520 = 343,520 : x
2. Step 2: Convert to fraction form
   156,738/343,520 = 343,520/x
3. Step 3: Cross multiply
   156,738x = 343,520 × 343,520
4. Step 4: Simplify right side
   156,738x = 118,005,990,400
5. Step 5: Solve for x
   x = 118,005,990,400/156,738
6. Step 6: Final answer
   x = 752,886.92