Finding the Third Proportional to 31,485 and 68,748

Step by Step Solution

1. Step 1: Write the proportion equation
   31,485 : 68,748 = 68,748 : x
2. Step 2: Convert to fraction form
   31,485/68,748 = 68,748/x
3. Step 3: Cross multiply
   31,485x = 68,748 × 68,748
4. Step 4: Simplify right side
   31,485x = 4,726,287,504
5. Step 5: Solve for x
   x = 4,726,287,504/31,485
6. Step 6: Final answer
   x = 150,112.36