Finding the Third Proportional to 145,188 and 218,632.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,188 : 218,632.50 = 218,632.50 : x
2. Step 2: Convert to fraction form
   145,188/218,632.50 = 218,632.50/x
3. Step 3: Cross multiply
   145,188x = 218,632.50 × 218,632.50
4. Step 4: Simplify right side
   145,188x = 47,800,170,056.25
5. Step 5: Solve for x
   x = 47,800,170,056.25/145,188
6. Step 6: Final answer
   x = 329,229.48