Finding the Fourth Proportional to 91.32, 136.91 and 37.18

Step by Step Solution

1. Step 1: Write the proportion equation
   91.32 : 136.91 = 37.18 : x
2. Step 2: Convert to fraction form
   91.32/136.91 = 37.18/x
3. Step 3: Cross multiply
   91.32x = 136.91 × 37.18
4. Step 4: Simplify right side
   91.32x = 5,090.31
5. Step 5: Solve for x
   x = 5,090.31/91.32
6. Step 6: Final answer
   x = 55.74