Finding the Fourth Proportional to 42.63, 58.83 and 38.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42.63 : 58.83 = 38.70 : x
2. Step 2: Convert to fraction form
   42.63/58.83 = 38.70/x
3. Step 3: Cross multiply
   42.63x = 58.83 × 38.70
4. Step 4: Simplify right side
   42.63x = 2,276.72
5. Step 5: Solve for x
   x = 2,276.72/42.63
6. Step 6: Final answer
   x = 53.41