Finding the Third Proportional to 146,989.50 and 321,991

Step by Step Solution

1. Step 1: Write the proportion equation
   146,989.50 : 321,991 = 321,991 : x
2. Step 2: Convert to fraction form
   146,989.50/321,991 = 321,991/x
3. Step 3: Cross multiply
   146,989.50x = 321,991 × 321,991
4. Step 4: Simplify right side
   146,989.50x = 103,678,204,081
5. Step 5: Solve for x
   x = 103,678,204,081/146,989.50
6. Step 6: Final answer
   x = 705,344.29