Finding the Fourth Proportional to 111.33, 153.72 and 106.47

Step by Step Solution

1. Step 1: Write the proportion equation
   111.33 : 153.72 = 106.47 : x
2. Step 2: Convert to fraction form
   111.33/153.72 = 106.47/x
3. Step 3: Cross multiply
   111.33x = 153.72 × 106.47
4. Step 4: Simplify right side
   111.33x = 16,366.57
5. Step 5: Solve for x
   x = 16,366.57/111.33
6. Step 6: Final answer
   x = 147.01