Finding the Fourth Proportional to 3,961.56, 5,936.58 and 2,221.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,961.56 : 5,936.58 = 2,221.32 : x
2. Step 2: Convert to fraction form
   3,961.56/5,936.58 = 2,221.32/x
3. Step 3: Cross multiply
   3,961.56x = 5,936.58 × 2,221.32
4. Step 4: Simplify right side
   3,961.56x = 13,187,043.89
5. Step 5: Solve for x
   x = 13,187,043.89/3,961.56
6. Step 6: Final answer
   x = 3,328.75