Finding the Fourth Proportional to 50.68, 69.88 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50.68 : 69.88 = 42.50 : x
2. Step 2: Convert to fraction form
   50.68/69.88 = 42.50/x
3. Step 3: Cross multiply
   50.68x = 69.88 × 42.50
4. Step 4: Simplify right side
   50.68x = 2,969.90
5. Step 5: Solve for x
   x = 2,969.90/50.68
6. Step 6: Final answer
   x = 58.60