Finding the Fourth Proportional to 2,570.37, 3,547.10 and 1,391.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.37 : 3,547.10 = 1,391.44 : x
2. Step 2: Convert to fraction form
   2,570.37/3,547.10 = 1,391.44/x
3. Step 3: Cross multiply
   2,570.37x = 3,547.10 × 1,391.44
4. Step 4: Simplify right side
   2,570.37x = 4,935,569.30
5. Step 5: Solve for x
   x = 4,935,569.30/2,570.37
6. Step 6: Final answer
   x = 1,920.18