Finding the Third Proportional to 145,200.50 and 219,990

Step by Step Solution

1. Step 1: Write the proportion equation
   145,200.50 : 219,990 = 219,990 : x
2. Step 2: Convert to fraction form
   145,200.50/219,990 = 219,990/x
3. Step 3: Cross multiply
   145,200.50x = 219,990 × 219,990
4. Step 4: Simplify right side
   145,200.50x = 48,395,600,100
5. Step 5: Solve for x
   x = 48,395,600,100/145,200.50
6. Step 6: Final answer
   x = 333,301.88