Finding the Fourth Proportional to 216,196.89, 324,262.06 and 72,105.25

Step by Step Solution

1. Step 1: Write the proportion equation
   216,196.89 : 324,262.06 = 72,105.25 : x
2. Step 2: Convert to fraction form
   216,196.89/324,262.06 = 72,105.25/x
3. Step 3: Cross multiply
   216,196.89x = 324,262.06 × 72,105.25
4. Step 4: Simplify right side
   216,196.89x = 23,380,995,280.50
5. Step 5: Solve for x
   x = 23,380,995,280.50/216,196.89
6. Step 6: Final answer
   x = 108,146.77