Finding the Fourth Proportional to 3,965.02, 5,471.30 and 2,196.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.02 : 5,471.30 = 2,196.45 : x
2. Step 2: Convert to fraction form
   3,965.02/5,471.30 = 2,196.45/x
3. Step 3: Cross multiply
   3,965.02x = 5,471.30 × 2,196.45
4. Step 4: Simplify right side
   3,965.02x = 12,017,442.38
5. Step 5: Solve for x
   x = 12,017,442.38/3,965.02
6. Step 6: Final answer
   x = 3,030.87