Finding the Fourth Proportional to 89.16, 123.01 and 64.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89.16 : 123.01 = 64.72 : x
2. Step 2: Convert to fraction form
   89.16/123.01 = 64.72/x
3. Step 3: Cross multiply
   89.16x = 123.01 × 64.72
4. Step 4: Simplify right side
   89.16x = 7,961.21
5. Step 5: Solve for x
   x = 7,961.21/89.16
6. Step 6: Final answer
   x = 89.29