Finding the Fourth Proportional to 120,550.69, 166,244.52 and 72,144.37

Step by Step Solution

1. Step 1: Write the proportion equation
   120,550.69 : 166,244.52 = 72,144.37 : x
2. Step 2: Convert to fraction form
   120,550.69/166,244.52 = 72,144.37/x
3. Step 3: Cross multiply
   120,550.69x = 166,244.52 × 72,144.37
4. Step 4: Simplify right side
   120,550.69x = 11,993,606,161.35
5. Step 5: Solve for x
   x = 11,993,606,161.35/120,550.69
6. Step 6: Final answer
   x = 99,490.15