Finding the Fourth Proportional to 111,429.92, 165,986.74 and 105,393.68

Step by Step Solution

1. Step 1: Write the proportion equation
   111,429.92 : 165,986.74 = 105,393.68 : x
2. Step 2: Convert to fraction form
   111,429.92/165,986.74 = 105,393.68/x
3. Step 3: Cross multiply
   111,429.92x = 165,986.74 × 105,393.68
4. Step 4: Simplify right side
   111,429.92x = 17,493,953,359.80
5. Step 5: Solve for x
   x = 17,493,953,359.80/111,429.92
6. Step 6: Final answer
   x = 156,995.12