Finding the Third Proportional to 2,128,406 and 3,189,480

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,406 : 3,189,480 = 3,189,480 : x
2. Step 2: Convert to fraction form
   2,128,406/3,189,480 = 3,189,480/x
3. Step 3: Cross multiply
   2,128,406x = 3,189,480 × 3,189,480
4. Step 4: Simplify right side
   2,128,406x = 10,172,782,670,400
5. Step 5: Solve for x
   x = 10,172,782,670,400/2,128,406
6. Step 6: Final answer
   x = 4,779,531.10