Finding the Fourth Proportional to 94.91, 142.16 and 72.05

Step by Step Solution

1. Step 1: Write the proportion equation
   94.91 : 142.16 = 72.05 : x
2. Step 2: Convert to fraction form
   94.91/142.16 = 72.05/x
3. Step 3: Cross multiply
   94.91x = 142.16 × 72.05
4. Step 4: Simplify right side
   94.91x = 10,241.56
5. Step 5: Solve for x
   x = 10,241.56/94.91
6. Step 6: Final answer
   x = 107.91