Finding the Fourth Proportional to 42.37, 63.16 and 37.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42.37 : 63.16 = 37.78 : x
2. Step 2: Convert to fraction form
   42.37/63.16 = 37.78/x
3. Step 3: Cross multiply
   42.37x = 63.16 × 37.78
4. Step 4: Simplify right side
   42.37x = 2,386.18
5. Step 5: Solve for x
   x = 2,386.18/42.37
6. Step 6: Final answer
   x = 56.32