Finding the Fourth Proportional to 89.01, 132.72 and 79.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89.01 : 132.72 = 79.38 : x
2. Step 2: Convert to fraction form
   89.01/132.72 = 79.38/x
3. Step 3: Cross multiply
   89.01x = 132.72 × 79.38
4. Step 4: Simplify right side
   89.01x = 10,535.31
5. Step 5: Solve for x
   x = 10,535.31/89.01
6. Step 6: Final answer
   x = 118.36