Finding the Fourth Proportional to 1,369.49, 1,889.37 and 872.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.49 : 1,889.37 = 872.04 : x
2. Step 2: Convert to fraction form
   1,369.49/1,889.37 = 872.04/x
3. Step 3: Cross multiply
   1,369.49x = 1,889.37 × 872.04
4. Step 4: Simplify right side
   1,369.49x = 1,647,606.21
5. Step 5: Solve for x
   x = 1,647,606.21/1,369.49
6. Step 6: Final answer
   x = 1,203.08