Finding the Third Proportional to 172,920 and 375,360

Step by Step Solution

1. Step 1: Write the proportion equation
   172,920 : 375,360 = 375,360 : x
2. Step 2: Convert to fraction form
   172,920/375,360 = 375,360/x
3. Step 3: Cross multiply
   172,920x = 375,360 × 375,360
4. Step 4: Simplify right side
   172,920x = 140,895,129,600
5. Step 5: Solve for x
   x = 140,895,129,600/172,920
6. Step 6: Final answer
   x = 814,799.50