Finding the Fourth Proportional to 69.81, 96.27 and 42.15

Step by Step Solution

1. Step 1: Write the proportion equation
   69.81 : 96.27 = 42.15 : x
2. Step 2: Convert to fraction form
   69.81/96.27 = 42.15/x
3. Step 3: Cross multiply
   69.81x = 96.27 × 42.15
4. Step 4: Simplify right side
   69.81x = 4,057.78
5. Step 5: Solve for x
   x = 4,057.78/69.81
6. Step 6: Final answer
   x = 58.13