Finding the Third Proportional to 2,128,620 and 3,215,048

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,620 : 3,215,048 = 3,215,048 : x
2. Step 2: Convert to fraction form
   2,128,620/3,215,048 = 3,215,048/x
3. Step 3: Cross multiply
   2,128,620x = 3,215,048 × 3,215,048
4. Step 4: Simplify right side
   2,128,620x = 10,336,533,642,304
5. Step 5: Solve for x
   x = 10,336,533,642,304/2,128,620
6. Step 6: Final answer
   x = 4,855,978.82