Finding the Fourth Proportional to 123,139.54, 169,932.63 and 66,550.96

Step by Step Solution

1. Step 1: Write the proportion equation
   123,139.54 : 169,932.63 = 66,550.96 : x
2. Step 2: Convert to fraction form
   123,139.54/169,932.63 = 66,550.96/x
3. Step 3: Cross multiply
   123,139.54x = 169,932.63 × 66,550.96
4. Step 4: Simplify right side
   123,139.54x = 11,309,179,661.82
5. Step 5: Solve for x
   x = 11,309,179,661.82/123,139.54
6. Step 6: Final answer
   x = 91,840.36