Finding the Fourth Proportional to 89.25, 123.17 and 63.42

Step by Step Solution

1. Step 1: Write the proportion equation
   89.25 : 123.17 = 63.42 : x
2. Step 2: Convert to fraction form
   89.25/123.17 = 63.42/x
3. Step 3: Cross multiply
   89.25x = 123.17 × 63.42
4. Step 4: Simplify right side
   89.25x = 7,811.12
5. Step 5: Solve for x
   x = 7,811.12/89.25
6. Step 6: Final answer
   x = 87.52