Finding the Fourth Proportional to 91.28, 136.88 and 37.16

Step by Step Solution

1. Step 1: Write the proportion equation
   91.28 : 136.88 = 37.16 : x
2. Step 2: Convert to fraction form
   91.28/136.88 = 37.16/x
3. Step 3: Cross multiply
   91.28x = 136.88 × 37.16
4. Step 4: Simplify right side
   91.28x = 5,085.59
5. Step 5: Solve for x
   x = 5,085.59/91.28
6. Step 6: Final answer
   x = 55.72