Finding the Fourth Proportional to 120,315.96, 166,053.60 and 69,318.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,315.96 : 166,053.60 = 69,318.72 : x
2. Step 2: Convert to fraction form
   120,315.96/166,053.60 = 69,318.72/x
3. Step 3: Cross multiply
   120,315.96x = 166,053.60 × 69,318.72
4. Step 4: Simplify right side
   120,315.96x = 11,510,623,003.39
5. Step 5: Solve for x
   x = 11,510,623,003.39/120,315.96
6. Step 6: Final answer
   x = 95,669.96