Finding the Fourth Proportional to 89.33, 123.23 and 64.74

Step by Step Solution

1. Step 1: Write the proportion equation
   89.33 : 123.23 = 64.74 : x
2. Step 2: Convert to fraction form
   89.33/123.23 = 64.74/x
3. Step 3: Cross multiply
   89.33x = 123.23 × 64.74
4. Step 4: Simplify right side
   89.33x = 7,977.59
5. Step 5: Solve for x
   x = 7,977.59/89.33
6. Step 6: Final answer
   x = 89.30