Finding the Fourth Proportional to 3,963.30, 5,556.30 and 3,963.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,963.30 : 5,556.30 = 3,963.30 : x
2. Step 2: Convert to fraction form
   3,963.30/5,556.30 = 3,963.30/x
3. Step 3: Cross multiply
   3,963.30x = 5,556.30 × 3,963.30
4. Step 4: Simplify right side
   3,963.30x = 22,021,283.79
5. Step 5: Solve for x
   x = 22,021,283.79/3,963.30
6. Step 6: Final answer
   x = 5,556.30