Finding the Fourth Proportional to 61.22, 91.69 and 50.42

Step by Step Solution

1. Step 1: Write the proportion equation
   61.22 : 91.69 = 50.42 : x
2. Step 2: Convert to fraction form
   61.22/91.69 = 50.42/x
3. Step 3: Cross multiply
   61.22x = 91.69 × 50.42
4. Step 4: Simplify right side
   61.22x = 4,622.65
5. Step 5: Solve for x
   x = 4,622.65/61.22
6. Step 6: Final answer
   x = 75.51