Finding the Fourth Proportional to 111,189.54, 166,850.72 and 102,144.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111,189.54 : 166,850.72 = 102,144.80 : x
2. Step 2: Convert to fraction form
   111,189.54/166,850.72 = 102,144.80/x
3. Step 3: Cross multiply
   111,189.54x = 166,850.72 × 102,144.80
4. Step 4: Simplify right side
   111,189.54x = 17,042,933,424.26
5. Step 5: Solve for x
   x = 17,042,933,424.26/111,189.54
6. Step 6: Final answer
   x = 153,278.21