Finding the Fourth Proportional to 1,369.09, 1,889.49 and 1,019.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.09 : 1,889.49 = 1,019.17 : x
2. Step 2: Convert to fraction form
   1,369.09/1,889.49 = 1,019.17/x
3. Step 3: Cross multiply
   1,369.09x = 1,889.49 × 1,019.17
4. Step 4: Simplify right side
   1,369.09x = 1,925,711.52
5. Step 5: Solve for x
   x = 1,925,711.52/1,369.09
6. Step 6: Final answer
   x = 1,406.56