Finding the Third Proportional to 20,520 and 25,447.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,520 : 25,447.50 = 25,447.50 : x
2. Step 2: Convert to fraction form
   20,520/25,447.50 = 25,447.50/x
3. Step 3: Cross multiply
   20,520x = 25,447.50 × 25,447.50
4. Step 4: Simplify right side
   20,520x = 647,575,256.25
5. Step 5: Solve for x
   x = 647,575,256.25/20,520
6. Step 6: Final answer
   x = 31,558.25