Finding the Fourth Proportional to 120,509.94, 166,284.18 and 75,180.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,509.94 : 166,284.18 = 75,180.72 : x
2. Step 2: Convert to fraction form
   120,509.94/166,284.18 = 75,180.72/x
3. Step 3: Cross multiply
   120,509.94x = 166,284.18 × 75,180.72
4. Step 4: Simplify right side
   120,509.94x = 12,501,364,377.01
5. Step 5: Solve for x
   x = 12,501,364,377.01/120,509.94
6. Step 6: Final answer
   x = 103,737.21