Finding the Fourth Proportional to 91.82, 137.71 and 37.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91.82 : 137.71 = 37.72 : x
2. Step 2: Convert to fraction form
   91.82/137.71 = 37.72/x
3. Step 3: Cross multiply
   91.82x = 137.71 × 37.72
4. Step 4: Simplify right side
   91.82x = 5,194.42
5. Step 5: Solve for x
   x = 5,194.42/91.82
6. Step 6: Final answer
   x = 56.57