Finding the Fourth Proportional to 91.87, 137.68 and 37.69

Step by Step Solution

1. Step 1: Write the proportion equation
   91.87 : 137.68 = 37.69 : x
2. Step 2: Convert to fraction form
   91.87/137.68 = 37.69/x
3. Step 3: Cross multiply
   91.87x = 137.68 × 37.69
4. Step 4: Simplify right side
   91.87x = 5,188.72
5. Step 5: Solve for x
   x = 5,188.72/91.87
6. Step 6: Final answer
   x = 56.48