Finding the Third Proportional to 8,381,808 and 12,816,320

Step by Step Solution

1. Step 1: Write the proportion equation
   8,381,808 : 12,816,320 = 12,816,320 : x
2. Step 2: Convert to fraction form
   8,381,808/12,816,320 = 12,816,320/x
3. Step 3: Cross multiply
   8,381,808x = 12,816,320 × 12,816,320
4. Step 4: Simplify right side
   8,381,808x = 164,258,058,342,400
5. Step 5: Solve for x
   x = 164,258,058,342,400/8,381,808
6. Step 6: Final answer
   x = 19,596,972.20