Finding the Fourth Proportional to 91.51, 137.31 and 37.42

Step by Step Solution

1. Step 1: Write the proportion equation
   91.51 : 137.31 = 37.42 : x
2. Step 2: Convert to fraction form
   91.51/137.31 = 37.42/x
3. Step 3: Cross multiply
   91.51x = 137.31 × 37.42
4. Step 4: Simplify right side
   91.51x = 5,138.14
5. Step 5: Solve for x
   x = 5,138.14/91.51
6. Step 6: Final answer
   x = 56.15