Finding the Third Proportional to 21,309.75 and 28,522.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,309.75 : 28,522.13 = 28,522.13 : x
2. Step 2: Convert to fraction form
   21,309.75/28,522.13 = 28,522.13/x
3. Step 3: Cross multiply
   21,309.75x = 28,522.13 × 28,522.13
4. Step 4: Simplify right side
   21,309.75x = 813,511,614.52
5. Step 5: Solve for x
   x = 813,511,614.52/21,309.75
6. Step 6: Final answer
   x = 38,175.56