Finding the Fourth Proportional to 3,965.22, 5,471.96 and 2,196.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.22 : 5,471.96 = 2,196.77 : x
2. Step 2: Convert to fraction form
   3,965.22/5,471.96 = 2,196.77/x
3. Step 3: Cross multiply
   3,965.22x = 5,471.96 × 2,196.77
4. Step 4: Simplify right side
   3,965.22x = 12,020,599.23
5. Step 5: Solve for x
   x = 12,020,599.23/3,965.22
6. Step 6: Final answer
   x = 3,031.51