Finding the Fourth Proportional to 3,965.08, 5,471.60 and 2,196.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.08 : 5,471.60 = 2,196.58 : x
2. Step 2: Convert to fraction form
   3,965.08/5,471.60 = 2,196.58/x
3. Step 3: Cross multiply
   3,965.08x = 5,471.60 × 2,196.58
4. Step 4: Simplify right side
   3,965.08x = 12,018,796.15
5. Step 5: Solve for x
   x = 12,018,796.15/3,965.08
6. Step 6: Final answer
   x = 3,031.16