Finding the Fourth Proportional to 91.58, 137.37 and 36.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91.58 : 137.37 = 36.72 : x
2. Step 2: Convert to fraction form
   91.58/137.37 = 36.72/x
3. Step 3: Cross multiply
   91.58x = 137.37 × 36.72
4. Step 4: Simplify right side
   91.58x = 5,044.23
5. Step 5: Solve for x
   x = 5,044.23/91.58
6. Step 6: Final answer
   x = 55.08