Finding the Fourth Proportional to 2,155.82, 2,975.04 and 1,369.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.82 : 2,975.04 = 1,369.88 : x
2. Step 2: Convert to fraction form
   2,155.82/2,975.04 = 1,369.88/x
3. Step 3: Cross multiply
   2,155.82x = 2,975.04 × 1,369.88
4. Step 4: Simplify right side
   2,155.82x = 4,075,447.80
5. Step 5: Solve for x
   x = 4,075,447.80/2,155.82
6. Step 6: Final answer
   x = 1,890.44