Finding the Third Proportional to 399,004 and 854,054

Step by Step Solution

1. Step 1: Write the proportion equation
   399,004 : 854,054 = 854,054 : x
2. Step 2: Convert to fraction form
   399,004/854,054 = 854,054/x
3. Step 3: Cross multiply
   399,004x = 854,054 × 854,054
4. Step 4: Simplify right side
   399,004x = 729,408,234,916
5. Step 5: Solve for x
   x = 729,408,234,916/399,004
6. Step 6: Final answer
   x = 1,828,072.49