Finding the Fourth Proportional to 111,442.42, 166,005.36 and 105,406.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111,442.42 : 166,005.36 = 105,406.18 : x
2. Step 2: Convert to fraction form
   111,442.42/166,005.36 = 105,406.18/x
3. Step 3: Cross multiply
   111,442.42x = 166,005.36 × 105,406.18
4. Step 4: Simplify right side
   111,442.42x = 17,497,990,857.12
5. Step 5: Solve for x
   x = 17,497,990,857.12/111,442.42
6. Step 6: Final answer
   x = 157,013.74