Finding the Third Proportional to 395,064 and 865,144

Step by Step Solution

1. Step 1: Write the proportion equation
   395,064 : 865,144 = 865,144 : x
2. Step 2: Convert to fraction form
   395,064/865,144 = 865,144/x
3. Step 3: Cross multiply
   395,064x = 865,144 × 865,144
4. Step 4: Simplify right side
   395,064x = 748,474,140,736
5. Step 5: Solve for x
   x = 748,474,140,736/395,064
6. Step 6: Final answer
   x = 1,894,564.27