Finding the Fourth Proportional to 91.96, 137.98 and 37.86

Step by Step Solution

1. Step 1: Write the proportion equation
   91.96 : 137.98 = 37.86 : x
2. Step 2: Convert to fraction form
   91.96/137.98 = 37.86/x
3. Step 3: Cross multiply
   91.96x = 137.98 × 37.86
4. Step 4: Simplify right side
   91.96x = 5,223.92
5. Step 5: Solve for x
   x = 5,223.92/91.96
6. Step 6: Final answer
   x = 56.81