Finding the Fourth Proportional to 103.42, 142.71 and 59.77

Step by Step Solution

1. Step 1: Write the proportion equation
   103.42 : 142.71 = 59.77 : x
2. Step 2: Convert to fraction form
   103.42/142.71 = 59.77/x
3. Step 3: Cross multiply
   103.42x = 142.71 × 59.77
4. Step 4: Simplify right side
   103.42x = 8,529.78
5. Step 5: Solve for x
   x = 8,529.78/103.42
6. Step 6: Final answer
   x = 82.48