Finding the Fourth Proportional to 3,964.86, 5,471.51 and 2,196.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.86 : 5,471.51 = 2,196.45 : x
2. Step 2: Convert to fraction form
   3,964.86/5,471.51 = 2,196.45/x
3. Step 3: Cross multiply
   3,964.86x = 5,471.51 × 2,196.45
4. Step 4: Simplify right side
   3,964.86x = 12,017,887.16
5. Step 5: Solve for x
   x = 12,017,887.16/3,964.86
6. Step 6: Final answer
   x = 3,031.10