Finding the Fourth Proportional to 91.48, 137.17 and 37.31

Step by Step Solution

1. Step 1: Write the proportion equation
   91.48 : 137.17 = 37.31 : x
2. Step 2: Convert to fraction form
   91.48/137.17 = 37.31/x
3. Step 3: Cross multiply
   91.48x = 137.17 × 37.31
4. Step 4: Simplify right side
   91.48x = 5,117.81
5. Step 5: Solve for x
   x = 5,117.81/91.48
6. Step 6: Final answer
   x = 55.94