Finding the Fourth Proportional to 89.88, 123.99 and 62.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89.88 : 123.99 = 62.25 : x
2. Step 2: Convert to fraction form
   89.88/123.99 = 62.25/x
3. Step 3: Cross multiply
   89.88x = 123.99 × 62.25
4. Step 4: Simplify right side
   89.88x = 7,718.38
5. Step 5: Solve for x
   x = 7,718.38/89.88
6. Step 6: Final answer
   x = 85.87