Finding the Fourth Proportional to 3,556.78, 5,309.50 and 3,397.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,556.78 : 5,309.50 = 3,397.02 : x
2. Step 2: Convert to fraction form
   3,556.78/5,309.50 = 3,397.02/x
3. Step 3: Cross multiply
   3,556.78x = 5,309.50 × 3,397.02
4. Step 4: Simplify right side
   3,556.78x = 18,036,477.69
5. Step 5: Solve for x
   x = 18,036,477.69/3,556.78
6. Step 6: Final answer
   x = 5,071.01