Finding the Fourth Proportional to 111,086.10, 166,241.61 and 90,861.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111,086.10 : 166,241.61 = 90,861.82 : x
2. Step 2: Convert to fraction form
   111,086.10/166,241.61 = 90,861.82/x
3. Step 3: Cross multiply
   111,086.10x = 166,241.61 × 90,861.82
4. Step 4: Simplify right side
   111,086.10x = 15,105,014,828.73
5. Step 5: Solve for x
   x = 15,105,014,828.73/111,086.10
6. Step 6: Final answer
   x = 135,975.74