Finding the Third Proportional to 172,710 and 374,940

Step by Step Solution

1. Step 1: Write the proportion equation
   172,710 : 374,940 = 374,940 : x
2. Step 2: Convert to fraction form
   172,710/374,940 = 374,940/x
3. Step 3: Cross multiply
   172,710x = 374,940 × 374,940
4. Step 4: Simplify right side
   172,710x = 140,580,003,600
5. Step 5: Solve for x
   x = 140,580,003,600/172,710
6. Step 6: Final answer
   x = 813,965.63