Finding the Third Proportional to 12,420 and 27,425.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,420 : 27,425.25 = 27,425.25 : x
2. Step 2: Convert to fraction form
   12,420/27,425.25 = 27,425.25/x
3. Step 3: Cross multiply
   12,420x = 27,425.25 × 27,425.25
4. Step 4: Simplify right side
   12,420x = 752,144,337.56
5. Step 5: Solve for x
   x = 752,144,337.56/12,420
6. Step 6: Final answer
   x = 60,559.13