Finding the Fourth Proportional to 111,036.83, 166,309.20 and 91,353.83

Step by Step Solution

1. Step 1: Write the proportion equation
   111,036.83 : 166,309.20 = 91,353.83 : x
2. Step 2: Convert to fraction form
   111,036.83/166,309.20 = 91,353.83/x
3. Step 3: Cross multiply
   111,036.83x = 166,309.20 × 91,353.83
4. Step 4: Simplify right side
   111,036.83x = 15,192,981,552.69
5. Step 5: Solve for x
   x = 15,192,981,552.69/111,036.83
6. Step 6: Final answer
   x = 136,828.31