Finding the Fourth Proportional to 111.32, 153.62 and 61.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 153.62 = 61.52 : x
2. Step 2: Convert to fraction form
   111.32/153.62 = 61.52/x
3. Step 3: Cross multiply
   111.32x = 153.62 × 61.52
4. Step 4: Simplify right side
   111.32x = 9,450.78
5. Step 5: Solve for x
   x = 9,450.78/111.32
6. Step 6: Final answer
   x = 84.90