Finding the Third Proportional to 12,661,655 and 25,770,780

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661,655 : 25,770,780 = 25,770,780 : x
2. Step 2: Convert to fraction form
   12,661,655/25,770,780 = 25,770,780/x
3. Step 3: Cross multiply
   12,661,655x = 25,770,780 × 25,770,780
4. Step 4: Simplify right side
   12,661,655x = 664,133,101,808,400
5. Step 5: Solve for x
   x = 664,133,101,808,400/12,661,655
6. Step 6: Final answer
   x = 52,452,313.84