Finding the Fourth Proportional to 2,570.22, 3,546.89 and 1,391.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.22 : 3,546.89 = 1,391.28 : x
2. Step 2: Convert to fraction form
   2,570.22/3,546.89 = 1,391.28/x
3. Step 3: Cross multiply
   2,570.22x = 3,546.89 × 1,391.28
4. Step 4: Simplify right side
   2,570.22x = 4,934,717.12
5. Step 5: Solve for x
   x = 4,934,717.12/2,570.22
6. Step 6: Final answer
   x = 1,919.96