Finding the Third Proportional to 1,215,372 and 2,649,430

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,372 : 2,649,430 = 2,649,430 : x
2. Step 2: Convert to fraction form
   1,215,372/2,649,430 = 2,649,430/x
3. Step 3: Cross multiply
   1,215,372x = 2,649,430 × 2,649,430
4. Step 4: Simplify right side
   1,215,372x = 7,019,479,324,900
5. Step 5: Solve for x
   x = 7,019,479,324,900/1,215,372
6. Step 6: Final answer
   x = 5,775,580.91