Finding the Third Proportional to 1,221,422 and 2,605,180

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,422 : 2,605,180 = 2,605,180 : x
2. Step 2: Convert to fraction form
   1,221,422/2,605,180 = 2,605,180/x
3. Step 3: Cross multiply
   1,221,422x = 2,605,180 × 2,605,180
4. Step 4: Simplify right side
   1,221,422x = 6,786,962,832,400
5. Step 5: Solve for x
   x = 6,786,962,832,400/1,221,422
6. Step 6: Final answer
   x = 5,556,607.65