Finding the Fourth Proportional to 94.91, 142.37 and 90.05

Step by Step Solution

1. Step 1: Write the proportion equation
   94.91 : 142.37 = 90.05 : x
2. Step 2: Convert to fraction form
   94.91/142.37 = 90.05/x
3. Step 3: Cross multiply
   94.91x = 142.37 × 90.05
4. Step 4: Simplify right side
   94.91x = 12,820.42
5. Step 5: Solve for x
   x = 12,820.42/94.91
6. Step 6: Final answer
   x = 135.08