Finding the Third Proportional to 216,972 and 324,300

Step by Step Solution

1. Step 1: Write the proportion equation
   216,972 : 324,300 = 324,300 : x
2. Step 2: Convert to fraction form
   216,972/324,300 = 324,300/x
3. Step 3: Cross multiply
   216,972x = 324,300 × 324,300
4. Step 4: Simplify right side
   216,972x = 105,170,490,000
5. Step 5: Solve for x
   x = 105,170,490,000/216,972
6. Step 6: Final answer
   x = 484,719.18