Finding the Third Proportional to 2,128,428 and 3,130,398

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,428 : 3,130,398 = 3,130,398 : x
2. Step 2: Convert to fraction form
   2,128,428/3,130,398 = 3,130,398/x
3. Step 3: Cross multiply
   2,128,428x = 3,130,398 × 3,130,398
4. Step 4: Simplify right side
   2,128,428x = 9,799,391,638,404
5. Step 5: Solve for x
   x = 9,799,391,638,404/2,128,428
6. Step 6: Final answer
   x = 4,604,051.27