Finding the Fourth Proportional to 120,507.94, 166,281.42 and 75,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,507.94 : 166,281.42 = 75,178.72 : x
2. Step 2: Convert to fraction form
   120,507.94/166,281.42 = 75,178.72/x
3. Step 3: Cross multiply
   120,507.94x = 166,281.42 × 75,178.72
4. Step 4: Simplify right side
   120,507.94x = 12,500,824,315.38
5. Step 5: Solve for x
   x = 12,500,824,315.38/120,507.94
6. Step 6: Final answer
   x = 103,734.45