Finding the Third Proportional to 2,128,424 and 3,130,392

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,424 : 3,130,392 = 3,130,392 : x
2. Step 2: Convert to fraction form
   2,128,424/3,130,392 = 3,130,392/x
3. Step 3: Cross multiply
   2,128,424x = 3,130,392 × 3,130,392
4. Step 4: Simplify right side
   2,128,424x = 9,799,354,073,664
5. Step 5: Solve for x
   x = 9,799,354,073,664/2,128,424
6. Step 6: Final answer
   x = 4,604,042.27