Finding the Fourth Proportional to 91.42, 137.14 and 37.31

Step by Step Solution

1. Step 1: Write the proportion equation
   91.42 : 137.14 = 37.31 : x
2. Step 2: Convert to fraction form
   91.42/137.14 = 37.31/x
3. Step 3: Cross multiply
   91.42x = 137.14 × 37.31
4. Step 4: Simplify right side
   91.42x = 5,117.25
5. Step 5: Solve for x
   x = 5,117.25/91.42
6. Step 6: Final answer
   x = 55.98