Finding the Fourth Proportional to 89.79, 123.69 and 63.52

Step by Step Solution

1. Step 1: Write the proportion equation
   89.79 : 123.69 = 63.52 : x
2. Step 2: Convert to fraction form
   89.79/123.69 = 63.52/x
3. Step 3: Cross multiply
   89.79x = 123.69 × 63.52
4. Step 4: Simplify right side
   89.79x = 7,856.16
5. Step 5: Solve for x
   x = 7,856.16/89.79
6. Step 6: Final answer
   x = 87.49