Finding the Third Proportional to 172,488 and 377,040

Step by Step Solution

1. Step 1: Write the proportion equation
   172,488 : 377,040 = 377,040 : x
2. Step 2: Convert to fraction form
   172,488/377,040 = 377,040/x
3. Step 3: Cross multiply
   172,488x = 377,040 × 377,040
4. Step 4: Simplify right side
   172,488x = 142,159,161,600
5. Step 5: Solve for x
   x = 142,159,161,600/172,488
6. Step 6: Final answer
   x = 824,168.42