Finding the Fourth Proportional to 91.31, 136.98 and 37.22

Step by Step Solution

1. Step 1: Write the proportion equation
   91.31 : 136.98 = 37.22 : x
2. Step 2: Convert to fraction form
   91.31/136.98 = 37.22/x
3. Step 3: Cross multiply
   91.31x = 136.98 × 37.22
4. Step 4: Simplify right side
   91.31x = 5,097.71
5. Step 5: Solve for x
   x = 5,097.71/91.31
6. Step 6: Final answer
   x = 55.83