Finding the Fourth Proportional to 111,441.42, 166,003.88 and 105,405.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111,441.42 : 166,003.88 = 105,405.18 : x
2. Step 2: Convert to fraction form
   111,441.42/166,003.88 = 105,405.18/x
3. Step 3: Cross multiply
   111,441.42x = 166,003.88 × 105,405.18
4. Step 4: Simplify right side
   111,441.42x = 17,497,668,325.07
5. Step 5: Solve for x
   x = 17,497,668,325.07/111,441.42
6. Step 6: Final answer
   x = 157,012.25