Finding the Third Proportional to 216,888 and 324,055.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,888 : 324,055.50 = 324,055.50 : x
2. Step 2: Convert to fraction form
   216,888/324,055.50 = 324,055.50/x
3. Step 3: Cross multiply
   216,888x = 324,055.50 × 324,055.50
4. Step 4: Simplify right side
   216,888x = 105,011,967,080.25
5. Step 5: Solve for x
   x = 105,011,967,080.25/216,888
6. Step 6: Final answer
   x = 484,176.01