Finding the Fourth Proportional to 89.01, 122.90 and 59.99

Step by Step Solution

1. Step 1: Write the proportion equation
   89.01 : 122.90 = 59.99 : x
2. Step 2: Convert to fraction form
   89.01/122.90 = 59.99/x
3. Step 3: Cross multiply
   89.01x = 122.90 × 59.99
4. Step 4: Simplify right side
   89.01x = 7,371.86
5. Step 5: Solve for x
   x = 7,371.86/89.01
6. Step 6: Final answer
   x = 82.82