Finding the Third Proportional to 3,946,890 and 8,502,864

Step by Step Solution

1. Step 1: Write the proportion equation
   3,946,890 : 8,502,864 = 8,502,864 : x
2. Step 2: Convert to fraction form
   3,946,890/8,502,864 = 8,502,864/x
3. Step 3: Cross multiply
   3,946,890x = 8,502,864 × 8,502,864
4. Step 4: Simplify right side
   3,946,890x = 72,298,696,202,496
5. Step 5: Solve for x
   x = 72,298,696,202,496/3,946,890
6. Step 6: Final answer
   x = 18,317,889.83