Finding the Third Proportional to 2,215,068 and 5,215,389

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215,068 : 5,215,389 = 5,215,389 : x
2. Step 2: Convert to fraction form
   2,215,068/5,215,389 = 5,215,389/x
3. Step 3: Cross multiply
   2,215,068x = 5,215,389 × 5,215,389
4. Step 4: Simplify right side
   2,215,068x = 27,200,282,421,321
5. Step 5: Solve for x
   x = 27,200,282,421,321/2,215,068
6. Step 6: Final answer
   x = 12,279,660.23