Finding the Fourth Proportional to 88.86, 133.31 and 43.21

Step by Step Solution

1. Step 1: Write the proportion equation
   88.86 : 133.31 = 43.21 : x
2. Step 2: Convert to fraction form
   88.86/133.31 = 43.21/x
3. Step 3: Cross multiply
   88.86x = 133.31 × 43.21
4. Step 4: Simplify right side
   88.86x = 5,760.33
5. Step 5: Solve for x
   x = 5,760.33/88.86
6. Step 6: Final answer
   x = 64.82