Finding the Third Proportional to 868,503 and 1,913,697

Step by Step Solution

1. Step 1: Write the proportion equation
   868,503 : 1,913,697 = 1,913,697 : x
2. Step 2: Convert to fraction form
   868,503/1,913,697 = 1,913,697/x
3. Step 3: Cross multiply
   868,503x = 1,913,697 × 1,913,697
4. Step 4: Simplify right side
   868,503x = 3,662,236,207,809
5. Step 5: Solve for x
   x = 3,662,236,207,809/868,503
6. Step 6: Final answer
   x = 4,216,722.58