Finding the Third Proportional to 15,279.75 and 20,447.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,279.75 : 20,447.50 = 20,447.50 : x
2. Step 2: Convert to fraction form
   15,279.75/20,447.50 = 20,447.50/x
3. Step 3: Cross multiply
   15,279.75x = 20,447.50 × 20,447.50
4. Step 4: Simplify right side
   15,279.75x = 418,100,256.25
5. Step 5: Solve for x
   x = 418,100,256.25/15,279.75
6. Step 6: Final answer
   x = 27,363.03