Finding the Third Proportional to 21,578.50 and 29,154.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,578.50 : 29,154.25 = 29,154.25 : x
2. Step 2: Convert to fraction form
   21,578.50/29,154.25 = 29,154.25/x
3. Step 3: Cross multiply
   21,578.50x = 29,154.25 × 29,154.25
4. Step 4: Simplify right side
   21,578.50x = 849,970,293.06
5. Step 5: Solve for x
   x = 849,970,293.06/21,578.50
6. Step 6: Final answer
   x = 39,389.68