Finding the Third Proportional to 402,192 and 851,040

Step by Step Solution

1. Step 1: Write the proportion equation
   402,192 : 851,040 = 851,040 : x
2. Step 2: Convert to fraction form
   402,192/851,040 = 851,040/x
3. Step 3: Cross multiply
   402,192x = 851,040 × 851,040
4. Step 4: Simplify right side
   402,192x = 724,269,081,600
5. Step 5: Solve for x
   x = 724,269,081,600/402,192
6. Step 6: Final answer
   x = 1,800,804.30