Finding the Third Proportional to 2,128,408 and 3,130,368

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,408 : 3,130,368 = 3,130,368 : x
2. Step 2: Convert to fraction form
   2,128,408/3,130,368 = 3,130,368/x
3. Step 3: Cross multiply
   2,128,408x = 3,130,368 × 3,130,368
4. Step 4: Simplify right side
   2,128,408x = 9,799,203,815,424
5. Step 5: Solve for x
   x = 9,799,203,815,424/2,128,408
6. Step 6: Final answer
   x = 4,604,006.29