Finding the Third Proportional to 12,420 and 18,461.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,420 : 18,461.25 = 18,461.25 : x
2. Step 2: Convert to fraction form
   12,420/18,461.25 = 18,461.25/x
3. Step 3: Cross multiply
   12,420x = 18,461.25 × 18,461.25
4. Step 4: Simplify right side
   12,420x = 340,817,751.56
5. Step 5: Solve for x
   x = 340,817,751.56/12,420
6. Step 6: Final answer
   x = 27,441.04