Finding the Fourth Proportional to 89.09, 122.83 and 64.52

Step by Step Solution

1. Step 1: Write the proportion equation
   89.09 : 122.83 = 64.52 : x
2. Step 2: Convert to fraction form
   89.09/122.83 = 64.52/x
3. Step 3: Cross multiply
   89.09x = 122.83 × 64.52
4. Step 4: Simplify right side
   89.09x = 7,925.04
5. Step 5: Solve for x
   x = 7,925.04/89.09
6. Step 6: Final answer
   x = 88.96