Finding the Fourth Proportional to 123,796.47, 170,879.78 and 72,806.97

Step by Step Solution

1. Step 1: Write the proportion equation
   123,796.47 : 170,879.78 = 72,806.97 : x
2. Step 2: Convert to fraction form
   123,796.47/170,879.78 = 72,806.97/x
3. Step 3: Cross multiply
   123,796.47x = 170,879.78 × 72,806.97
4. Step 4: Simplify right side
   123,796.47x = 12,441,238,652.03
5. Step 5: Solve for x
   x = 12,441,238,652.03/123,796.47
6. Step 6: Final answer
   x = 100,497.52