Finding the Third Proportional to 1,478,404 and 2,161,478

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478,404 : 2,161,478 = 2,161,478 : x
2. Step 2: Convert to fraction form
   1,478,404/2,161,478 = 2,161,478/x
3. Step 3: Cross multiply
   1,478,404x = 2,161,478 × 2,161,478
4. Step 4: Simplify right side
   1,478,404x = 4,671,987,144,484
5. Step 5: Solve for x
   x = 4,671,987,144,484/1,478,404
6. Step 6: Final answer
   x = 3,160,155.91