Finding the Third Proportional to 13,155.75 and 20,216.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.75 : 20,216.25 = 20,216.25 : x
2. Step 2: Convert to fraction form
   13,155.75/20,216.25 = 20,216.25/x
3. Step 3: Cross multiply
   13,155.75x = 20,216.25 × 20,216.25
4. Step 4: Simplify right side
   13,155.75x = 408,696,764.06
5. Step 5: Solve for x
   x = 408,696,764.06/13,155.75
6. Step 6: Final answer
   x = 31,066.02