Finding the Fourth Proportional to 89.12, 133.72 and 53.08

Step by Step Solution

1. Step 1: Write the proportion equation
   89.12 : 133.72 = 53.08 : x
2. Step 2: Convert to fraction form
   89.12/133.72 = 53.08/x
3. Step 3: Cross multiply
   89.12x = 133.72 × 53.08
4. Step 4: Simplify right side
   89.12x = 7,097.86
5. Step 5: Solve for x
   x = 7,097.86/89.12
6. Step 6: Final answer
   x = 79.64