Finding the Third Proportional to 402,303 and 863,020.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,303 : 863,020.50 = 863,020.50 : x
2. Step 2: Convert to fraction form
   402,303/863,020.50 = 863,020.50/x
3. Step 3: Cross multiply
   402,303x = 863,020.50 × 863,020.50
4. Step 4: Simplify right side
   402,303x = 744,804,383,420.25
5. Step 5: Solve for x
   x = 744,804,383,420.25/402,303
6. Step 6: Final answer
   x = 1,851,351.80