Finding the Third Proportional to 172,644 and 369,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,644 : 369,271.50 = 369,271.50 : x
2. Step 2: Convert to fraction form
   172,644/369,271.50 = 369,271.50/x
3. Step 3: Cross multiply
   172,644x = 369,271.50 × 369,271.50
4. Step 4: Simplify right side
   172,644x = 136,361,440,712.25
5. Step 5: Solve for x
   x = 136,361,440,712.25/172,644
6. Step 6: Final answer
   x = 789,841.76