Finding the Third Proportional to 511,490 and 852,446.50

Step by Step Solution

1. Step 1: Write the proportion equation
   511,490 : 852,446.50 = 852,446.50 : x
2. Step 2: Convert to fraction form
   511,490/852,446.50 = 852,446.50/x
3. Step 3: Cross multiply
   511,490x = 852,446.50 × 852,446.50
4. Step 4: Simplify right side
   511,490x = 726,665,035,362.25
5. Step 5: Solve for x
   x = 726,665,035,362.25/511,490
6. Step 6: Final answer
   x = 1,420,682.78