Finding the Fourth Proportional to 111.22, 153.72 and 98.00

Step by Step Solution

1. Step 1: Write the proportion equation
   111.22 : 153.72 = 98.00 : x
2. Step 2: Convert to fraction form
   111.22/153.72 = 98.00/x
3. Step 3: Cross multiply
   111.22x = 153.72 × 98.00
4. Step 4: Simplify right side
   111.22x = 15,064.94
5. Step 5: Solve for x
   x = 15,064.94/111.22
6. Step 6: Final answer
   x = 135.45