Finding the Third Proportional to 399,269.25 and 870,795

Step by Step Solution

1. Step 1: Write the proportion equation
   399,269.25 : 870,795 = 870,795 : x
2. Step 2: Convert to fraction form
   399,269.25/870,795 = 870,795/x
3. Step 3: Cross multiply
   399,269.25x = 870,795 × 870,795
4. Step 4: Simplify right side
   399,269.25x = 758,283,932,025
5. Step 5: Solve for x
   x = 758,283,932,025/399,269.25
6. Step 6: Final answer
   x = 1,899,179.39