Finding the Third Proportional to 156,640 and 343,898

Step by Step Solution

1. Step 1: Write the proportion equation
   156,640 : 343,898 = 343,898 : x
2. Step 2: Convert to fraction form
   156,640/343,898 = 343,898/x
3. Step 3: Cross multiply
   156,640x = 343,898 × 343,898
4. Step 4: Simplify right side
   156,640x = 118,265,834,404
5. Step 5: Solve for x
   x = 118,265,834,404/156,640
6. Step 6: Final answer
   x = 755,016.82