Finding the Third Proportional to 396,483.50 and 864,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,483.50 : 864,431.50 = 864,431.50 : x
2. Step 2: Convert to fraction form
   396,483.50/864,431.50 = 864,431.50/x
3. Step 3: Cross multiply
   396,483.50x = 864,431.50 × 864,431.50
4. Step 4: Simplify right side
   396,483.50x = 747,241,818,192.25
5. Step 5: Solve for x
   x = 747,241,818,192.25/396,483.50
6. Step 6: Final answer
   x = 1,884,673.18