Finding the Third Proportional to 399,008 and 854,064

Step by Step Solution

1. Step 1: Write the proportion equation
   399,008 : 854,064 = 854,064 : x
2. Step 2: Convert to fraction form
   399,008/854,064 = 854,064/x
3. Step 3: Cross multiply
   399,008x = 854,064 × 854,064
4. Step 4: Simplify right side
   399,008x = 729,425,316,096
5. Step 5: Solve for x
   x = 729,425,316,096/399,008
6. Step 6: Final answer
   x = 1,828,096.97