Finding the Fourth Proportional to 1,578.77, 2,369.37 and 1,271.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578.77 : 2,369.37 = 1,271.37 : x
2. Step 2: Convert to fraction form
   1,578.77/2,369.37 = 1,271.37/x
3. Step 3: Cross multiply
   1,578.77x = 2,369.37 × 1,271.37
4. Step 4: Simplify right side
   1,578.77x = 3,012,345.94
5. Step 5: Solve for x
   x = 3,012,345.94/1,578.77
6. Step 6: Final answer
   x = 1,908.03