Finding the Third Proportional to 868,492 and 1,913,678

Step by Step Solution

1. Step 1: Write the proportion equation
   868,492 : 1,913,678 = 1,913,678 : x
2. Step 2: Convert to fraction form
   868,492/1,913,678 = 1,913,678/x
3. Step 3: Cross multiply
   868,492x = 1,913,678 × 1,913,678
4. Step 4: Simplify right side
   868,492x = 3,662,163,487,684
5. Step 5: Solve for x
   x = 3,662,163,487,684/868,492
6. Step 6: Final answer
   x = 4,216,692.25