Finding the Third Proportional to 2,128,616 and 3,215,040

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,616 : 3,215,040 = 3,215,040 : x
2. Step 2: Convert to fraction form
   2,128,616/3,215,040 = 3,215,040/x
3. Step 3: Cross multiply
   2,128,616x = 3,215,040 × 3,215,040
4. Step 4: Simplify right side
   2,128,616x = 10,336,482,201,600
5. Step 5: Solve for x
   x = 10,336,482,201,600/2,128,616
6. Step 6: Final answer
   x = 4,855,963.78