Finding the Third Proportional to 172,415 and 375,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,415 : 375,868.50 = 375,868.50 : x
2. Step 2: Convert to fraction form
   172,415/375,868.50 = 375,868.50/x
3. Step 3: Cross multiply
   172,415x = 375,868.50 × 375,868.50
4. Step 4: Simplify right side
   172,415x = 141,277,129,292.25
5. Step 5: Solve for x
   x = 141,277,129,292.25/172,415
6. Step 6: Final answer
   x = 819,401.61