Finding the Fourth Proportional to 91.55, 137.20 and 37.42

Step by Step Solution

1. Step 1: Write the proportion equation
   91.55 : 137.20 = 37.42 : x
2. Step 2: Convert to fraction form
   91.55/137.20 = 37.42/x
3. Step 3: Cross multiply
   91.55x = 137.20 × 37.42
4. Step 4: Simplify right side
   91.55x = 5,134.02
5. Step 5: Solve for x
   x = 5,134.02/91.55
6. Step 6: Final answer
   x = 56.08