Finding the Fourth Proportional to 89.62, 123.72 and 63.52

Step by Step Solution

1. Step 1: Write the proportion equation
   89.62 : 123.72 = 63.52 : x
2. Step 2: Convert to fraction form
   89.62/123.72 = 63.52/x
3. Step 3: Cross multiply
   89.62x = 123.72 × 63.52
4. Step 4: Simplify right side
   89.62x = 7,858.69
5. Step 5: Solve for x
   x = 7,858.69/89.62
6. Step 6: Final answer
   x = 87.69