Finding the Third Proportional to 172,036 and 260,648

Step by Step Solution

1. Step 1: Write the proportion equation
   172,036 : 260,648 = 260,648 : x
2. Step 2: Convert to fraction form
   172,036/260,648 = 260,648/x
3. Step 3: Cross multiply
   172,036x = 260,648 × 260,648
4. Step 4: Simplify right side
   172,036x = 67,937,379,904
5. Step 5: Solve for x
   x = 67,937,379,904/172,036
6. Step 6: Final answer
   x = 394,902.11