Finding the Third Proportional to 31,488 and 68,754

Step by Step Solution

1. Step 1: Write the proportion equation
   31,488 : 68,754 = 68,754 : x
2. Step 2: Convert to fraction form
   31,488/68,754 = 68,754/x
3. Step 3: Cross multiply
   31,488x = 68,754 × 68,754
4. Step 4: Simplify right side
   31,488x = 4,727,112,516
5. Step 5: Solve for x
   x = 4,727,112,516/31,488
6. Step 6: Final answer
   x = 150,124.25