Finding the Third Proportional to 1,215,204 and 2,659,146

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,204 : 2,659,146 = 2,659,146 : x
2. Step 2: Convert to fraction form
   1,215,204/2,659,146 = 2,659,146/x
3. Step 3: Cross multiply
   1,215,204x = 2,659,146 × 2,659,146
4. Step 4: Simplify right side
   1,215,204x = 7,071,057,449,316
5. Step 5: Solve for x
   x = 7,071,057,449,316/1,215,204
6. Step 6: Final answer
   x = 5,818,823.38