Finding the Fourth Proportional to 91.37, 137.46 and 76.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91.37 : 137.46 = 76.25 : x
2. Step 2: Convert to fraction form
   91.37/137.46 = 76.25/x
3. Step 3: Cross multiply
   91.37x = 137.46 × 76.25
4. Step 4: Simplify right side
   91.37x = 10,481.33
5. Step 5: Solve for x
   x = 10,481.33/91.37
6. Step 6: Final answer
   x = 114.71