Finding the Fourth Proportional to 5,961.20, 8,228.06 and 3,721.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,961.20 : 8,228.06 = 3,721.72 : x
2. Step 2: Convert to fraction form
   5,961.20/8,228.06 = 3,721.72/x
3. Step 3: Cross multiply
   5,961.20x = 8,228.06 × 3,721.72
4. Step 4: Simplify right side
   5,961.20x = 30,622,538.34
5. Step 5: Solve for x
   x = 30,622,538.34/5,961.20
6. Step 6: Final answer
   x = 5,136.98