Finding the Fourth Proportional to 89.16, 133.62 and 53.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89.16 : 133.62 = 53.10 : x
2. Step 2: Convert to fraction form
   89.16/133.62 = 53.10/x
3. Step 3: Cross multiply
   89.16x = 133.62 × 53.10
4. Step 4: Simplify right side
   89.16x = 7,095.22
5. Step 5: Solve for x
   x = 7,095.22/89.16
6. Step 6: Final answer
   x = 79.58