Finding the Third Proportional to 17,981 and 39,240

Step by Step Solution

1. Step 1: Write the proportion equation
   17,981 : 39,240 = 39,240 : x
2. Step 2: Convert to fraction form
   17,981/39,240 = 39,240/x
3. Step 3: Cross multiply
   17,981x = 39,240 × 39,240
4. Step 4: Simplify right side
   17,981x = 1,539,777,600
5. Step 5: Solve for x
   x = 1,539,777,600/17,981
6. Step 6: Final answer
   x = 85,633.59