Finding the Third Proportional to 749,618 and 1,639,040

Step by Step Solution

1. Step 1: Write the proportion equation
   749,618 : 1,639,040 = 1,639,040 : x
2. Step 2: Convert to fraction form
   749,618/1,639,040 = 1,639,040/x
3. Step 3: Cross multiply
   749,618x = 1,639,040 × 1,639,040
4. Step 4: Simplify right side
   749,618x = 2,686,452,121,600
5. Step 5: Solve for x
   x = 2,686,452,121,600/749,618
6. Step 6: Final answer
   x = 3,583,761.49