Finding the Fourth Proportional to 120,820, 166,733.85 and 67,109.98

Step by Step Solution

1. Step 1: Write the proportion equation
   120,820 : 166,733.85 = 67,109.98 : x
2. Step 2: Convert to fraction form
   120,820/166,733.85 = 67,109.98/x
3. Step 3: Cross multiply
   120,820x = 166,733.85 × 67,109.98
4. Step 4: Simplify right side
   120,820x = 11,189,505,338.82
5. Step 5: Solve for x
   x = 11,189,505,338.82/120,820
6. Step 6: Final answer
   x = 92,613.02