Finding the Fourth Proportional to 91.54, 137.31 and 36.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91.54 : 137.31 = 36.72 : x
2. Step 2: Convert to fraction form
   91.54/137.31 = 36.72/x
3. Step 3: Cross multiply
   91.54x = 137.31 × 36.72
4. Step 4: Simplify right side
   91.54x = 5,042.15
5. Step 5: Solve for x
   x = 5,042.15/91.54
6. Step 6: Final answer
   x = 55.08