Finding the Fourth Proportional to 42.33, 63.15 and 38.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42.33 : 63.15 = 38.88 : x
2. Step 2: Convert to fraction form
   42.33/63.15 = 38.88/x
3. Step 3: Cross multiply
   42.33x = 63.15 × 38.88
4. Step 4: Simplify right side
   42.33x = 2,455.27
5. Step 5: Solve for x
   x = 2,455.27/42.33
6. Step 6: Final answer
   x = 58.00