Finding the Third Proportional to 21,136.50 and 38,854.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,136.50 : 38,854.50 = 38,854.50 : x
2. Step 2: Convert to fraction form
   21,136.50/38,854.50 = 38,854.50/x
3. Step 3: Cross multiply
   21,136.50x = 38,854.50 × 38,854.50
4. Step 4: Simplify right side
   21,136.50x = 1,509,672,170.25
5. Step 5: Solve for x
   x = 1,509,672,170.25/21,136.50
6. Step 6: Final answer
   x = 71,424.89