Finding the Third Proportional to 399,501.50 and 855,865

Step by Step Solution

1. Step 1: Write the proportion equation
   399,501.50 : 855,865 = 855,865 : x
2. Step 2: Convert to fraction form
   399,501.50/855,865 = 855,865/x
3. Step 3: Cross multiply
   399,501.50x = 855,865 × 855,865
4. Step 4: Simplify right side
   399,501.50x = 732,504,898,225
5. Step 5: Solve for x
   x = 732,504,898,225/399,501.50
6. Step 6: Final answer
   x = 1,833,547.30