Finding the Third Proportional to 145,550.25 and 217,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,550.25 : 217,426.50 = 217,426.50 : x
2. Step 2: Convert to fraction form
   145,550.25/217,426.50 = 217,426.50/x
3. Step 3: Cross multiply
   145,550.25x = 217,426.50 × 217,426.50
4. Step 4: Simplify right side
   145,550.25x = 47,274,282,902.25
5. Step 5: Solve for x
   x = 47,274,282,902.25/145,550.25
6. Step 6: Final answer
   x = 324,796.99