Finding the Third Proportional to 13,858.50 and 21,981

Step by Step Solution

1. Step 1: Write the proportion equation
   13,858.50 : 21,981 = 21,981 : x
2. Step 2: Convert to fraction form
   13,858.50/21,981 = 21,981/x
3. Step 3: Cross multiply
   13,858.50x = 21,981 × 21,981
4. Step 4: Simplify right side
   13,858.50x = 483,164,361
5. Step 5: Solve for x
   x = 483,164,361/13,858.50
6. Step 6: Final answer
   x = 34,864.12