Finding the Fourth Proportional to 91.31, 136.89 and 37.17

Step by Step Solution

1. Step 1: Write the proportion equation
   91.31 : 136.89 = 37.17 : x
2. Step 2: Convert to fraction form
   91.31/136.89 = 37.17/x
3. Step 3: Cross multiply
   91.31x = 136.89 × 37.17
4. Step 4: Simplify right side
   91.31x = 5,088.20
5. Step 5: Solve for x
   x = 5,088.20/91.31
6. Step 6: Final answer
   x = 55.72