Finding the Fourth Proportional to 89.86, 134.43 and 57.82

Step by Step Solution

1. Step 1: Write the proportion equation
   89.86 : 134.43 = 57.82 : x
2. Step 2: Convert to fraction form
   89.86/134.43 = 57.82/x
3. Step 3: Cross multiply
   89.86x = 134.43 × 57.82
4. Step 4: Simplify right side
   89.86x = 7,772.74
5. Step 5: Solve for x
   x = 7,772.74/89.86
6. Step 6: Final answer
   x = 86.50