Finding the Third Proportional to 399,492 and 855,846

Step by Step Solution

1. Step 1: Write the proportion equation
   399,492 : 855,846 = 855,846 : x
2. Step 2: Convert to fraction form
   399,492/855,846 = 855,846/x
3. Step 3: Cross multiply
   399,492x = 855,846 × 855,846
4. Step 4: Simplify right side
   399,492x = 732,472,375,716
5. Step 5: Solve for x
   x = 732,472,375,716/399,492
6. Step 6: Final answer
   x = 1,833,509.50