Finding the Fourth Proportional to 3,969.51, 5,475.31 and 2,550.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969.51 : 5,475.31 = 2,550.96 : x
2. Step 2: Convert to fraction form
   3,969.51/5,475.31 = 2,550.96/x
3. Step 3: Cross multiply
   3,969.51x = 5,475.31 × 2,550.96
4. Step 4: Simplify right side
   3,969.51x = 13,967,296.80
5. Step 5: Solve for x
   x = 13,967,296.80/3,969.51
6. Step 6: Final answer
   x = 3,518.65