Finding the Fourth Proportional to 2,570.42, 3,547.17 and 1,391.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.42 : 3,547.17 = 1,391.49 : x
2. Step 2: Convert to fraction form
   2,570.42/3,547.17 = 1,391.49/x
3. Step 3: Cross multiply
   2,570.42x = 3,547.17 × 1,391.49
4. Step 4: Simplify right side
   2,570.42x = 4,935,851.58
5. Step 5: Solve for x
   x = 4,935,851.58/2,570.42
6. Step 6: Final answer
   x = 1,920.25