Finding the Fourth Proportional to 120,821.74, 166,734.18 and 67,105.38

Step by Step Solution

1. Step 1: Write the proportion equation
   120,821.74 : 166,734.18 = 67,105.38 : x
2. Step 2: Convert to fraction form
   120,821.74/166,734.18 = 67,105.38/x
3. Step 3: Cross multiply
   120,821.74x = 166,734.18 × 67,105.38
4. Step 4: Simplify right side
   120,821.74x = 11,188,760,507.89
5. Step 5: Solve for x
   x = 11,188,760,507.89/120,821.74
6. Step 6: Final answer
   x = 92,605.52