Finding the Fourth Proportional to 2,155.68, 2,974.32 and 1,369.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.68 : 2,974.32 = 1,369.44 : x
2. Step 2: Convert to fraction form
   2,155.68/2,974.32 = 1,369.44/x
3. Step 3: Cross multiply
   2,155.68x = 2,974.32 × 1,369.44
4. Step 4: Simplify right side
   2,155.68x = 4,073,152.78
5. Step 5: Solve for x
   x = 4,073,152.78/2,155.68
6. Step 6: Final answer
   x = 1,889.50