Finding the Fourth Proportional to 91.56, 137.32 and 37.42

Step by Step Solution

1. Step 1: Write the proportion equation
   91.56 : 137.32 = 37.42 : x
2. Step 2: Convert to fraction form
   91.56/137.32 = 37.42/x
3. Step 3: Cross multiply
   91.56x = 137.32 × 37.42
4. Step 4: Simplify right side
   91.56x = 5,138.51
5. Step 5: Solve for x
   x = 5,138.51/91.56
6. Step 6: Final answer
   x = 56.12