Finding the Third Proportional to 1,261,670 and 1,890,631

Step by Step Solution

1. Step 1: Write the proportion equation
   1,261,670 : 1,890,631 = 1,890,631 : x
2. Step 2: Convert to fraction form
   1,261,670/1,890,631 = 1,890,631/x
3. Step 3: Cross multiply
   1,261,670x = 1,890,631 × 1,890,631
4. Step 4: Simplify right side
   1,261,670x = 3,574,485,578,161
5. Step 5: Solve for x
   x = 3,574,485,578,161/1,261,670
6. Step 6: Final answer
   x = 2,833,138.28