Finding the Fourth Proportional to 5,055.39, 7,578.18 and 2,591.37

Step by Step Solution

1. Step 1: Write the proportion equation
   5,055.39 : 7,578.18 = 2,591.37 : x
2. Step 2: Convert to fraction form
   5,055.39/7,578.18 = 2,591.37/x
3. Step 3: Cross multiply
   5,055.39x = 7,578.18 × 2,591.37
4. Step 4: Simplify right side
   5,055.39x = 19,637,868.31
5. Step 5: Solve for x
   x = 19,637,868.31/5,055.39
6. Step 6: Final answer
   x = 3,884.54