Finding the Fourth Proportional to 3,851.51, 5,785.09 and 3,399.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,851.51 : 5,785.09 = 3,399.53 : x
2. Step 2: Convert to fraction form
   3,851.51/5,785.09 = 3,399.53/x
3. Step 3: Cross multiply
   3,851.51x = 5,785.09 × 3,399.53
4. Step 4: Simplify right side
   3,851.51x = 19,666,549.58
5. Step 5: Solve for x
   x = 19,666,549.58/3,851.51
6. Step 6: Final answer
   x = 5,106.20