Finding the Fourth Proportional to 93.33, 128.72 and 65.69

Step by Step Solution

1. Step 1: Write the proportion equation
   93.33 : 128.72 = 65.69 : x
2. Step 2: Convert to fraction form
   93.33/128.72 = 65.69/x
3. Step 3: Cross multiply
   93.33x = 128.72 × 65.69
4. Step 4: Simplify right side
   93.33x = 8,455.62
5. Step 5: Solve for x
   x = 8,455.62/93.33
6. Step 6: Final answer
   x = 90.60