Finding the Third Proportional to 12,209.75 and 25,918.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.75 : 25,918.75 = 25,918.75 : x
2. Step 2: Convert to fraction form
   12,209.75/25,918.75 = 25,918.75/x
3. Step 3: Cross multiply
   12,209.75x = 25,918.75 × 25,918.75
4. Step 4: Simplify right side
   12,209.75x = 671,781,601.56
5. Step 5: Solve for x
   x = 671,781,601.56/12,209.75
6. Step 6: Final answer
   x = 55,020.09