Finding the Fourth Proportional to 2,570.54, 3,547.32 and 1,391.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.54 : 3,547.32 = 1,391.59 : x
2. Step 2: Convert to fraction form
   2,570.54/3,547.32 = 1,391.59/x
3. Step 3: Cross multiply
   2,570.54x = 3,547.32 × 1,391.59
4. Step 4: Simplify right side
   2,570.54x = 4,936,415.04
5. Step 5: Solve for x
   x = 4,936,415.04/2,570.54
6. Step 6: Final answer
   x = 1,920.38