Finding the Fourth Proportional to 91.59, 137.27 and 42.77

Step by Step Solution

1. Step 1: Write the proportion equation
   91.59 : 137.27 = 42.77 : x
2. Step 2: Convert to fraction form
   91.59/137.27 = 42.77/x
3. Step 3: Cross multiply
   91.59x = 137.27 × 42.77
4. Step 4: Simplify right side
   91.59x = 5,871.49
5. Step 5: Solve for x
   x = 5,871.49/91.59
6. Step 6: Final answer
   x = 64.11