Finding the Third Proportional to 1,233,858 and 1,680,921

Step by Step Solution

1. Step 1: Write the proportion equation
   1,233,858 : 1,680,921 = 1,680,921 : x
2. Step 2: Convert to fraction form
   1,233,858/1,680,921 = 1,680,921/x
3. Step 3: Cross multiply
   1,233,858x = 1,680,921 × 1,680,921
4. Step 4: Simplify right side
   1,233,858x = 2,825,495,408,241
5. Step 5: Solve for x
   x = 2,825,495,408,241/1,233,858
6. Step 6: Final answer
   x = 2,289,968.06