Finding the Fourth Proportional to 89.76, 123.72 and 62.08

Step by Step Solution

1. Step 1: Write the proportion equation
   89.76 : 123.72 = 62.08 : x
2. Step 2: Convert to fraction form
   89.76/123.72 = 62.08/x
3. Step 3: Cross multiply
   89.76x = 123.72 × 62.08
4. Step 4: Simplify right side
   89.76x = 7,680.54
5. Step 5: Solve for x
   x = 7,680.54/89.76
6. Step 6: Final answer
   x = 85.57