Finding the Fourth Proportional to 91.71, 126.82 and 83.54

Step by Step Solution

1. Step 1: Write the proportion equation
   91.71 : 126.82 = 83.54 : x
2. Step 2: Convert to fraction form
   91.71/126.82 = 83.54/x
3. Step 3: Cross multiply
   91.71x = 126.82 × 83.54
4. Step 4: Simplify right side
   91.71x = 10,594.54
5. Step 5: Solve for x
   x = 10,594.54/91.71
6. Step 6: Final answer
   x = 115.52