Finding the Third Proportional to 2,128,400 and 3,130,356

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,400 : 3,130,356 = 3,130,356 : x
2. Step 2: Convert to fraction form
   2,128,400/3,130,356 = 3,130,356/x
3. Step 3: Cross multiply
   2,128,400x = 3,130,356 × 3,130,356
4. Step 4: Simplify right side
   2,128,400x = 9,799,128,686,736
5. Step 5: Solve for x
   x = 9,799,128,686,736/2,128,400
6. Step 6: Final answer
   x = 4,603,988.29