Finding the Third Proportional to 1,428,768 and 2,161,520

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428,768 : 2,161,520 = 2,161,520 : x
2. Step 2: Convert to fraction form
   1,428,768/2,161,520 = 2,161,520/x
3. Step 3: Cross multiply
   1,428,768x = 2,161,520 × 2,161,520
4. Step 4: Simplify right side
   1,428,768x = 4,672,168,710,400
5. Step 5: Solve for x
   x = 4,672,168,710,400/1,428,768
6. Step 6: Final answer
   x = 3,270,068.14