Finding the Fourth Proportional to 152.79, 210.72 and 111.48

Step by Step Solution

1. Step 1: Write the proportion equation
   152.79 : 210.72 = 111.48 : x
2. Step 2: Convert to fraction form
   152.79/210.72 = 111.48/x
3. Step 3: Cross multiply
   152.79x = 210.72 × 111.48
4. Step 4: Simplify right side
   152.79x = 23,491.07
5. Step 5: Solve for x
   x = 23,491.07/152.79
6. Step 6: Final answer
   x = 153.75