Finding the Fourth Proportional to 51.61, 71.12 and 42.37

Step by Step Solution

1. Step 1: Write the proportion equation
   51.61 : 71.12 = 42.37 : x
2. Step 2: Convert to fraction form
   51.61/71.12 = 42.37/x
3. Step 3: Cross multiply
   51.61x = 71.12 × 42.37
4. Step 4: Simplify right side
   51.61x = 3,013.00
5. Step 5: Solve for x
   x = 3,013.00/51.61
6. Step 6: Final answer
   x = 58.39