Finding the Fourth Proportional to 111,322.80, 166,983.12 and 28,216.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111,322.80 : 166,983.12 = 28,216.80 : x
2. Step 2: Convert to fraction form
   111,322.80/166,983.12 = 28,216.80/x
3. Step 3: Cross multiply
   111,322.80x = 166,983.12 × 28,216.80
4. Step 4: Simplify right side
   111,322.80x = 4,711,729,300.42
5. Step 5: Solve for x
   x = 4,711,729,300.42/111,322.80
6. Step 6: Final answer
   x = 42,324.93