Finding the Fourth Proportional to 141.10, 194.56 and 91.89

Step by Step Solution

1. Step 1: Write the proportion equation
   141.10 : 194.56 = 91.89 : x
2. Step 2: Convert to fraction form
   141.10/194.56 = 91.89/x
3. Step 3: Cross multiply
   141.10x = 194.56 × 91.89
4. Step 4: Simplify right side
   141.10x = 17,877.89
5. Step 5: Solve for x
   x = 17,877.89/141.10
6. Step 6: Final answer
   x = 126.71