Finding the Third Proportional to 1,215,208 and 2,659,156

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,208 : 2,659,156 = 2,659,156 : x
2. Step 2: Convert to fraction form
   1,215,208/2,659,156 = 2,659,156/x
3. Step 3: Cross multiply
   1,215,208x = 2,659,156 × 2,659,156
4. Step 4: Simplify right side
   1,215,208x = 7,071,110,632,336
5. Step 5: Solve for x
   x = 7,071,110,632,336/1,215,208
6. Step 6: Final answer
   x = 5,818,847.99