Finding the Fourth Proportional to 85.56, 117.98 and 50.59

Step by Step Solution

1. Step 1: Write the proportion equation
   85.56 : 117.98 = 50.59 : x
2. Step 2: Convert to fraction form
   85.56/117.98 = 50.59/x
3. Step 3: Cross multiply
   85.56x = 117.98 × 50.59
4. Step 4: Simplify right side
   85.56x = 5,968.34
5. Step 5: Solve for x
   x = 5,968.34/85.56
6. Step 6: Final answer
   x = 69.76