Finding the Third Proportional to 12,139,626 and 18,289,631

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139,626 : 18,289,631 = 18,289,631 : x
2. Step 2: Convert to fraction form
   12,139,626/18,289,631 = 18,289,631/x
3. Step 3: Cross multiply
   12,139,626x = 18,289,631 × 18,289,631
4. Step 4: Simplify right side
   12,139,626x = 334,510,602,116,161
5. Step 5: Solve for x
   x = 334,510,602,116,161/12,139,626
6. Step 6: Final answer
   x = 27,555,264.23