Finding the Fourth Proportional to 120,346.09, 166,105.49 and 80,061.55

Step by Step Solution

1. Step 1: Write the proportion equation
   120,346.09 : 166,105.49 = 80,061.55 : x
2. Step 2: Convert to fraction form
   120,346.09/166,105.49 = 80,061.55/x
3. Step 3: Cross multiply
   120,346.09x = 166,105.49 × 80,061.55
4. Step 4: Simplify right side
   120,346.09x = 13,298,662,177.34
5. Step 5: Solve for x
   x = 13,298,662,177.34/120,346.09
6. Step 6: Final answer
   x = 110,503.49