Finding the Third Proportional to 12,459,897 and 18,216,805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,459,897 : 18,216,805.50 = 18,216,805.50 : x
2. Step 2: Convert to fraction form
   12,459,897/18,216,805.50 = 18,216,805.50/x
3. Step 3: Cross multiply
   12,459,897x = 18,216,805.50 × 18,216,805.50
4. Step 4: Simplify right side
   12,459,897x = 331,852,002,624,830.25
5. Step 5: Solve for x
   x = 331,852,002,624,830.25/12,459,897
6. Step 6: Final answer
   x = 26,633,607.21