Finding the Fourth Proportional to 2,570.47, 3,547.25 and 1,391.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.47 : 3,547.25 = 1,391.54 : x
2. Step 2: Convert to fraction form
   2,570.47/3,547.25 = 1,391.54/x
3. Step 3: Cross multiply
   2,570.47x = 3,547.25 × 1,391.54
4. Step 4: Simplify right side
   2,570.47x = 4,936,132.35
5. Step 5: Solve for x
   x = 4,936,132.35/2,570.47
6. Step 6: Final answer
   x = 1,920.32