Finding the Fourth Proportional to 1,371.57, 1,891.33 and 1,036.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.57 : 1,891.33 = 1,036.26 : x
2. Step 2: Convert to fraction form
   1,371.57/1,891.33 = 1,036.26/x
3. Step 3: Cross multiply
   1,371.57x = 1,891.33 × 1,036.26
4. Step 4: Simplify right side
   1,371.57x = 1,959,907.04
5. Step 5: Solve for x
   x = 1,959,907.04/1,371.57
6. Step 6: Final answer
   x = 1,428.96