Finding the Third Proportional to 1,249,790 and 1,866,510

Step by Step Solution

1. Step 1: Write the proportion equation
   1,249,790 : 1,866,510 = 1,866,510 : x
2. Step 2: Convert to fraction form
   1,249,790/1,866,510 = 1,866,510/x
3. Step 3: Cross multiply
   1,249,790x = 1,866,510 × 1,866,510
4. Step 4: Simplify right side
   1,249,790x = 3,483,859,580,100
5. Step 5: Solve for x
   x = 3,483,859,580,100/1,249,790
6. Step 6: Final answer
   x = 2,787,555.97