Finding the Third Proportional to 890,631 and 1,868,743

Step by Step Solution

1. Step 1: Write the proportion equation
   890,631 : 1,868,743 = 1,868,743 : x
2. Step 2: Convert to fraction form
   890,631/1,868,743 = 1,868,743/x
3. Step 3: Cross multiply
   890,631x = 1,868,743 × 1,868,743
4. Step 4: Simplify right side
   890,631x = 3,492,200,400,049
5. Step 5: Solve for x
   x = 3,492,200,400,049/890,631
6. Step 6: Final answer
   x = 3,921,040.70