Finding the Fourth Proportional to 89.91, 123.98 and 62.22

Step by Step Solution

1. Step 1: Write the proportion equation
   89.91 : 123.98 = 62.22 : x
2. Step 2: Convert to fraction form
   89.91/123.98 = 62.22/x
3. Step 3: Cross multiply
   89.91x = 123.98 × 62.22
4. Step 4: Simplify right side
   89.91x = 7,713.84
5. Step 5: Solve for x
   x = 7,713.84/89.91
6. Step 6: Final answer
   x = 85.80