Finding the Third Proportional to 215,498.50 and 324,888

Step by Step Solution

1. Step 1: Write the proportion equation
   215,498.50 : 324,888 = 324,888 : x
2. Step 2: Convert to fraction form
   215,498.50/324,888 = 324,888/x
3. Step 3: Cross multiply
   215,498.50x = 324,888 × 324,888
4. Step 4: Simplify right side
   215,498.50x = 105,552,212,544
5. Step 5: Solve for x
   x = 105,552,212,544/215,498.50
6. Step 6: Final answer
   x = 489,804.86