Finding the Third Proportional to 12,810 and 20,051.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,810 : 20,051.25 = 20,051.25 : x
2. Step 2: Convert to fraction form
   12,810/20,051.25 = 20,051.25/x
3. Step 3: Cross multiply
   12,810x = 20,051.25 × 20,051.25
4. Step 4: Simplify right side
   12,810x = 402,052,626.56
5. Step 5: Solve for x
   x = 402,052,626.56/12,810
6. Step 6: Final answer
   x = 31,385.84