Finding the Third Proportional to 12,363,640 and 18,912,612

Step by Step Solution

1. Step 1: Write the proportion equation
   12,363,640 : 18,912,612 = 18,912,612 : x
2. Step 2: Convert to fraction form
   12,363,640/18,912,612 = 18,912,612/x
3. Step 3: Cross multiply
   12,363,640x = 18,912,612 × 18,912,612
4. Step 4: Simplify right side
   12,363,640x = 357,686,892,662,544
5. Step 5: Solve for x
   x = 357,686,892,662,544/12,363,640
6. Step 6: Final answer
   x = 28,930,548.99