Finding the Third Proportional to 12,459,900 and 18,216,810

Step by Step Solution

1. Step 1: Write the proportion equation
   12,459,900 : 18,216,810 = 18,216,810 : x
2. Step 2: Convert to fraction form
   12,459,900/18,216,810 = 18,216,810/x
3. Step 3: Cross multiply
   12,459,900x = 18,216,810 × 18,216,810
4. Step 4: Simplify right side
   12,459,900x = 331,852,166,576,100
5. Step 5: Solve for x
   x = 331,852,166,576,100/12,459,900
6. Step 6: Final answer
   x = 26,633,613.96