Finding the Third Proportional to 2,138,163 and 4,311,318

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138,163 : 4,311,318 = 4,311,318 : x
2. Step 2: Convert to fraction form
   2,138,163/4,311,318 = 4,311,318/x
3. Step 3: Cross multiply
   2,138,163x = 4,311,318 × 4,311,318
4. Step 4: Simplify right side
   2,138,163x = 18,587,462,897,124
5. Step 5: Solve for x
   x = 18,587,462,897,124/2,138,163
6. Step 6: Final answer
   x = 8,693,192.66