Finding the Fourth Proportional to 91.89, 137.91 and 37.82

Step by Step Solution

1. Step 1: Write the proportion equation
   91.89 : 137.91 = 37.82 : x
2. Step 2: Convert to fraction form
   91.89/137.91 = 37.82/x
3. Step 3: Cross multiply
   91.89x = 137.91 × 37.82
4. Step 4: Simplify right side
   91.89x = 5,215.76
5. Step 5: Solve for x
   x = 5,215.76/91.89
6. Step 6: Final answer
   x = 56.76