Finding the Fourth Proportional to 42.50, 63.35 and 42.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42.50 : 63.35 = 42.23 : x
2. Step 2: Convert to fraction form
   42.50/63.35 = 42.23/x
3. Step 3: Cross multiply
   42.50x = 63.35 × 42.23
4. Step 4: Simplify right side
   42.50x = 2,674.74
5. Step 5: Solve for x
   x = 2,674.74/42.50
6. Step 6: Final answer
   x = 62.94