Finding the Fourth Proportional to 91.69, 137.37 and 40.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91.69 : 137.37 = 40.25 : x
2. Step 2: Convert to fraction form
   91.69/137.37 = 40.25/x
3. Step 3: Cross multiply
   91.69x = 137.37 × 40.25
4. Step 4: Simplify right side
   91.69x = 5,528.75
5. Step 5: Solve for x
   x = 5,528.75/91.69
6. Step 6: Final answer
   x = 60.30