Finding the Fourth Proportional to 152.89, 210.70 and 111.32

Step by Step Solution

1. Step 1: Write the proportion equation
   152.89 : 210.70 = 111.32 : x
2. Step 2: Convert to fraction form
   152.89/210.70 = 111.32/x
3. Step 3: Cross multiply
   152.89x = 210.70 × 111.32
4. Step 4: Simplify right side
   152.89x = 23,456.18
5. Step 5: Solve for x
   x = 23,456.18/152.89
6. Step 6: Final answer
   x = 153.42