Finding the Fourth Proportional to 120,633.72, 166,365.54 and 75,315.84

Step by Step Solution

1. Step 1: Write the proportion equation
   120,633.72 : 166,365.54 = 75,315.84 : x
2. Step 2: Convert to fraction form
   120,633.72/166,365.54 = 75,315.84/x
3. Step 3: Cross multiply
   120,633.72x = 166,365.54 × 75,315.84
4. Step 4: Simplify right side
   120,633.72x = 12,529,960,392.15
5. Step 5: Solve for x
   x = 12,529,960,392.15/120,633.72
6. Step 6: Final answer
   x = 103,867.81