Finding the Third Proportional to 13,939.50 and 30,981

Step by Step Solution

1. Step 1: Write the proportion equation
   13,939.50 : 30,981 = 30,981 : x
2. Step 2: Convert to fraction form
   13,939.50/30,981 = 30,981/x
3. Step 3: Cross multiply
   13,939.50x = 30,981 × 30,981
4. Step 4: Simplify right side
   13,939.50x = 959,822,361
5. Step 5: Solve for x
   x = 959,822,361/13,939.50
6. Step 6: Final answer
   x = 68,856.30