Finding the Third Proportional to 399,631.50 and 855,945

Step by Step Solution

1. Step 1: Write the proportion equation
   399,631.50 : 855,945 = 855,945 : x
2. Step 2: Convert to fraction form
   399,631.50/855,945 = 855,945/x
3. Step 3: Cross multiply
   399,631.50x = 855,945 × 855,945
4. Step 4: Simplify right side
   399,631.50x = 732,641,843,025
5. Step 5: Solve for x
   x = 732,641,843,025/399,631.50
6. Step 6: Final answer
   x = 1,833,293.53