Finding the Fourth Proportional to 91.94, 136.83 and 90.14

Step by Step Solution

1. Step 1: Write the proportion equation
   91.94 : 136.83 = 90.14 : x
2. Step 2: Convert to fraction form
   91.94/136.83 = 90.14/x
3. Step 3: Cross multiply
   91.94x = 136.83 × 90.14
4. Step 4: Simplify right side
   91.94x = 12,333.17
5. Step 5: Solve for x
   x = 12,333.17/91.94
6. Step 6: Final answer
   x = 134.15