Finding the Third Proportional to 31,487 and 68,752

Step by Step Solution

1. Step 1: Write the proportion equation
   31,487 : 68,752 = 68,752 : x
2. Step 2: Convert to fraction form
   31,487/68,752 = 68,752/x
3. Step 3: Cross multiply
   31,487x = 68,752 × 68,752
4. Step 4: Simplify right side
   31,487x = 4,726,837,504
5. Step 5: Solve for x
   x = 4,726,837,504/31,487
6. Step 6: Final answer
   x = 150,120.29