Finding the Fourth Proportional to 91.37, 137.00 and 40.00

Step by Step Solution

1. Step 1: Write the proportion equation
   91.37 : 137.00 = 40.00 : x
2. Step 2: Convert to fraction form
   91.37/137.00 = 40.00/x
3. Step 3: Cross multiply
   91.37x = 137.00 × 40.00
4. Step 4: Simplify right side
   91.37x = 5,479.76
5. Step 5: Solve for x
   x = 5,479.76/91.37
6. Step 6: Final answer
   x = 59.98