Finding the Third Proportional to 12,139,624 and 18,289,628

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139,624 : 18,289,628 = 18,289,628 : x
2. Step 2: Convert to fraction form
   12,139,624/18,289,628 = 18,289,628/x
3. Step 3: Cross multiply
   12,139,624x = 18,289,628 × 18,289,628
4. Step 4: Simplify right side
   12,139,624x = 334,510,492,378,384
5. Step 5: Solve for x
   x = 334,510,492,378,384/12,139,624
6. Step 6: Final answer
   x = 27,555,259.73