Finding the Fourth Proportional to 89.76, 134.63 and 59.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89.76 : 134.63 = 59.31 : x
2. Step 2: Convert to fraction form
   89.76/134.63 = 59.31/x
3. Step 3: Cross multiply
   89.76x = 134.63 × 59.31
4. Step 4: Simplify right side
   89.76x = 7,985.56
5. Step 5: Solve for x
   x = 7,985.56/89.76
6. Step 6: Final answer
   x = 88.97