Finding the Third Proportional to 31,776 and 68,137.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,776 : 68,137.50 = 68,137.50 : x
2. Step 2: Convert to fraction form
   31,776/68,137.50 = 68,137.50/x
3. Step 3: Cross multiply
   31,776x = 68,137.50 × 68,137.50
4. Step 4: Simplify right side
   31,776x = 4,642,718,906.25
5. Step 5: Solve for x
   x = 4,642,718,906.25/31,776
6. Step 6: Final answer
   x = 146,107.72