Finding the Fourth Proportional to 89.35, 123.25 and 63.12

Step by Step Solution

1. Step 1: Write the proportion equation
   89.35 : 123.25 = 63.12 : x
2. Step 2: Convert to fraction form
   89.35/123.25 = 63.12/x
3. Step 3: Cross multiply
   89.35x = 123.25 × 63.12
4. Step 4: Simplify right side
   89.35x = 7,779.44
5. Step 5: Solve for x
   x = 7,779.44/89.35
6. Step 6: Final answer
   x = 87.06