Finding the Fourth Proportional to 199.83, 275.76 and 111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   199.83 : 275.76 = 111.31 : x
2. Step 2: Convert to fraction form
   199.83/275.76 = 111.31/x
3. Step 3: Cross multiply
   199.83x = 275.76 × 111.31
4. Step 4: Simplify right side
   199.83x = 30,695.09
5. Step 5: Solve for x
   x = 30,695.09/199.83
6. Step 6: Final answer
   x = 153.61