Finding the Third Proportional to 8,465,640 and 12,774,780

Step by Step Solution

1. Step 1: Write the proportion equation
   8,465,640 : 12,774,780 = 12,774,780 : x
2. Step 2: Convert to fraction form
   8,465,640/12,774,780 = 12,774,780/x
3. Step 3: Cross multiply
   8,465,640x = 12,774,780 × 12,774,780
4. Step 4: Simplify right side
   8,465,640x = 163,195,004,048,400
5. Step 5: Solve for x
   x = 163,195,004,048,400/8,465,640
6. Step 6: Final answer
   x = 19,277,338.05