Finding the Fourth Proportional to 94.15, 141.23 and 42.78

Step by Step Solution

1. Step 1: Write the proportion equation
   94.15 : 141.23 = 42.78 : x
2. Step 2: Convert to fraction form
   94.15/141.23 = 42.78/x
3. Step 3: Cross multiply
   94.15x = 141.23 × 42.78
4. Step 4: Simplify right side
   94.15x = 6,041.82
5. Step 5: Solve for x
   x = 6,041.82/94.15
6. Step 6: Final answer
   x = 64.17