Finding the Fourth Proportional to 111.10, 153.28 and 71.74

Step by Step Solution

1. Step 1: Write the proportion equation
   111.10 : 153.28 = 71.74 : x
2. Step 2: Convert to fraction form
   111.10/153.28 = 71.74/x
3. Step 3: Cross multiply
   111.10x = 153.28 × 71.74
4. Step 4: Simplify right side
   111.10x = 10,996.31
5. Step 5: Solve for x
   x = 10,996.31/111.10
6. Step 6: Final answer
   x = 98.98