Finding the Third Proportional to 1,247,738 and 1,863,290

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247,738 : 1,863,290 = 1,863,290 : x
2. Step 2: Convert to fraction form
   1,247,738/1,863,290 = 1,863,290/x
3. Step 3: Cross multiply
   1,247,738x = 1,863,290 × 1,863,290
4. Step 4: Simplify right side
   1,247,738x = 3,471,849,624,100
5. Step 5: Solve for x
   x = 3,471,849,624,100/1,247,738
6. Step 6: Final answer
   x = 2,782,514.94