Finding the Third Proportional to 145,521 and 218,470.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,521 : 218,470.50 = 218,470.50 : x
2. Step 2: Convert to fraction form
   145,521/218,470.50 = 218,470.50/x
3. Step 3: Cross multiply
   145,521x = 218,470.50 × 218,470.50
4. Step 4: Simplify right side
   145,521x = 47,729,359,370.25
5. Step 5: Solve for x
   x = 47,729,359,370.25/145,521
6. Step 6: Final answer
   x = 327,989.50