Finding the Fourth Proportional to 91.86, 137.69 and 37.69

Step by Step Solution

1. Step 1: Write the proportion equation
   91.86 : 137.69 = 37.69 : x
2. Step 2: Convert to fraction form
   91.86/137.69 = 37.69/x
3. Step 3: Cross multiply
   91.86x = 137.69 × 37.69
4. Step 4: Simplify right side
   91.86x = 5,189.00
5. Step 5: Solve for x
   x = 5,189.00/91.86
6. Step 6: Final answer
   x = 56.49