Finding the Fourth Proportional to 89.71, 134.42 and 53.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89.71 : 134.42 = 53.10 : x
2. Step 2: Convert to fraction form
   89.71/134.42 = 53.10/x
3. Step 3: Cross multiply
   89.71x = 134.42 × 53.10
4. Step 4: Simplify right side
   89.71x = 7,137.44
5. Step 5: Solve for x
   x = 7,137.44/89.71
6. Step 6: Final answer
   x = 79.56