Finding the Third Proportional to 12,981 and 19,747.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981 : 19,747.50 = 19,747.50 : x
2. Step 2: Convert to fraction form
   12,981/19,747.50 = 19,747.50/x
3. Step 3: Cross multiply
   12,981x = 19,747.50 × 19,747.50
4. Step 4: Simplify right side
   12,981x = 389,963,756.25
5. Step 5: Solve for x
   x = 389,963,756.25/12,981
6. Step 6: Final answer
   x = 30,041.12