Finding the Fourth Proportional to 1,391.46, 1,928.98 and 1,317.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.46 : 1,928.98 = 1,317.48 : x
2. Step 2: Convert to fraction form
   1,391.46/1,928.98 = 1,317.48/x
3. Step 3: Cross multiply
   1,391.46x = 1,928.98 × 1,317.48
4. Step 4: Simplify right side
   1,391.46x = 2,541,392.57
5. Step 5: Solve for x
   x = 2,541,392.57/1,391.46
6. Step 6: Final answer
   x = 1,826.42