Finding the Third Proportional to 389,326.50 and 863,196.75

Step by Step Solution

1. Step 1: Write the proportion equation
   389,326.50 : 863,196.75 = 863,196.75 : x
2. Step 2: Convert to fraction form
   389,326.50/863,196.75 = 863,196.75/x
3. Step 3: Cross multiply
   389,326.50x = 863,196.75 × 863,196.75
4. Step 4: Simplify right side
   389,326.50x = 745,108,629,210.56
5. Step 5: Solve for x
   x = 745,108,629,210.56/389,326.50
6. Step 6: Final answer
   x = 1,913,840.00