Finding the Third Proportional to 8,381,820 and 12,816,338

Step by Step Solution

1. Step 1: Write the proportion equation
   8,381,820 : 12,816,338 = 12,816,338 : x
2. Step 2: Convert to fraction form
   8,381,820/12,816,338 = 12,816,338/x
3. Step 3: Cross multiply
   8,381,820x = 12,816,338 × 12,816,338
4. Step 4: Simplify right side
   8,381,820x = 164,258,519,730,244
5. Step 5: Solve for x
   x = 164,258,519,730,244/8,381,820
6. Step 6: Final answer
   x = 19,596,999.19