Finding the Third Proportional to 638,870 and 1,366,382

Step by Step Solution

1. Step 1: Write the proportion equation
   638,870 : 1,366,382 = 1,366,382 : x
2. Step 2: Convert to fraction form
   638,870/1,366,382 = 1,366,382/x
3. Step 3: Cross multiply
   638,870x = 1,366,382 × 1,366,382
4. Step 4: Simplify right side
   638,870x = 1,866,999,769,924
5. Step 5: Solve for x
   x = 1,866,999,769,924/638,870
6. Step 6: Final answer
   x = 2,922,346.91