Finding the Fourth Proportional to 2,570.30, 3,547.01 and 1,391.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.30 : 3,547.01 = 1,391.37 : x
2. Step 2: Convert to fraction form
   2,570.30/3,547.01 = 1,391.37/x
3. Step 3: Cross multiply
   2,570.30x = 3,547.01 × 1,391.37
4. Step 4: Simplify right side
   2,570.30x = 4,935,203.30
5. Step 5: Solve for x
   x = 4,935,203.30/2,570.30
6. Step 6: Final answer
   x = 1,920.09