Finding the Third Proportional to 851,392 and 1,280,663

Step by Step Solution

1. Step 1: Write the proportion equation
   851,392 : 1,280,663 = 1,280,663 : x
2. Step 2: Convert to fraction form
   851,392/1,280,663 = 1,280,663/x
3. Step 3: Cross multiply
   851,392x = 1,280,663 × 1,280,663
4. Step 4: Simplify right side
   851,392x = 1,640,097,719,569
5. Step 5: Solve for x
   x = 1,640,097,719,569/851,392
6. Step 6: Final answer
   x = 1,926,372.01