Finding the Third Proportional to 511,870.50 and 802,905

Step by Step Solution

1. Step 1: Write the proportion equation
   511,870.50 : 802,905 = 802,905 : x
2. Step 2: Convert to fraction form
   511,870.50/802,905 = 802,905/x
3. Step 3: Cross multiply
   511,870.50x = 802,905 × 802,905
4. Step 4: Simplify right side
   511,870.50x = 644,656,439,025
5. Step 5: Solve for x
   x = 644,656,439,025/511,870.50
6. Step 6: Final answer
   x = 1,259,413.15