Finding the Fourth Proportional to 91.37, 137.03 and 40.01

Step by Step Solution

1. Step 1: Write the proportion equation
   91.37 : 137.03 = 40.01 : x
2. Step 2: Convert to fraction form
   91.37/137.03 = 40.01/x
3. Step 3: Cross multiply
   91.37x = 137.03 × 40.01
4. Step 4: Simplify right side
   91.37x = 5,481.69
5. Step 5: Solve for x
   x = 5,481.69/91.37
6. Step 6: Final answer
   x = 59.99