Finding the Fourth Proportional to 50.31, 69.37 and 42.12

Step by Step Solution

1. Step 1: Write the proportion equation
   50.31 : 69.37 = 42.12 : x
2. Step 2: Convert to fraction form
   50.31/69.37 = 42.12/x
3. Step 3: Cross multiply
   50.31x = 69.37 × 42.12
4. Step 4: Simplify right side
   50.31x = 2,921.76
5. Step 5: Solve for x
   x = 2,921.76/50.31
6. Step 6: Final answer
   x = 58.08