Finding the Fourth Proportional to 1,391.29, 2,089.01 and 874.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.29 : 2,089.01 = 874.56 : x
2. Step 2: Convert to fraction form
   1,391.29/2,089.01 = 874.56/x
3. Step 3: Cross multiply
   1,391.29x = 2,089.01 × 874.56
4. Step 4: Simplify right side
   1,391.29x = 1,826,964.59
5. Step 5: Solve for x
   x = 1,826,964.59/1,391.29
6. Step 6: Final answer
   x = 1,313.14