Finding the Third Proportional to 216,996 and 325,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,996 : 325,279.50 = 325,279.50 : x
2. Step 2: Convert to fraction form
   216,996/325,279.50 = 325,279.50/x
3. Step 3: Cross multiply
   216,996x = 325,279.50 × 325,279.50
4. Step 4: Simplify right side
   216,996x = 105,806,753,120.25
5. Step 5: Solve for x
   x = 105,806,753,120.25/216,996
6. Step 6: Final answer
   x = 487,597.71