Finding the Third Proportional to 2,128,422 and 3,130,389

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,422 : 3,130,389 = 3,130,389 : x
2. Step 2: Convert to fraction form
   2,128,422/3,130,389 = 3,130,389/x
3. Step 3: Cross multiply
   2,128,422x = 3,130,389 × 3,130,389
4. Step 4: Simplify right side
   2,128,422x = 9,799,335,291,321
5. Step 5: Solve for x
   x = 9,799,335,291,321/2,128,422
6. Step 6: Final answer
   x = 4,604,037.78