Finding the Fourth Proportional to 51.86, 71.61 and 35.48

Step by Step Solution

1. Step 1: Write the proportion equation
   51.86 : 71.61 = 35.48 : x
2. Step 2: Convert to fraction form
   51.86/71.61 = 35.48/x
3. Step 3: Cross multiply
   51.86x = 71.61 × 35.48
4. Step 4: Simplify right side
   51.86x = 2,540.72
5. Step 5: Solve for x
   x = 2,540.72/51.86
6. Step 6: Final answer
   x = 48.99