Finding the Third Proportional to 156,945 and 342,320

Step by Step Solution

1. Step 1: Write the proportion equation
   156,945 : 342,320 = 342,320 : x
2. Step 2: Convert to fraction form
   156,945/342,320 = 342,320/x
3. Step 3: Cross multiply
   156,945x = 342,320 × 342,320
4. Step 4: Simplify right side
   156,945x = 117,182,982,400
5. Step 5: Solve for x
   x = 117,182,982,400/156,945
6. Step 6: Final answer
   x = 746,649.99