Finding the Fourth Proportional to 85.55, 118.01 and 50.56

Step by Step Solution

1. Step 1: Write the proportion equation
   85.55 : 118.01 = 50.56 : x
2. Step 2: Convert to fraction form
   85.55/118.01 = 50.56/x
3. Step 3: Cross multiply
   85.55x = 118.01 × 50.56
4. Step 4: Simplify right side
   85.55x = 5,966.42
5. Step 5: Solve for x
   x = 5,966.42/85.55
6. Step 6: Final answer
   x = 69.75