Finding the Fourth Proportional to 2,570.31, 3,546.99 and 1,391.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.31 : 3,546.99 = 1,391.37 : x
2. Step 2: Convert to fraction form
   2,570.31/3,546.99 = 1,391.37/x
3. Step 3: Cross multiply
   2,570.31x = 3,546.99 × 1,391.37
4. Step 4: Simplify right side
   2,570.31x = 4,935,175.48
5. Step 5: Solve for x
   x = 4,935,175.48/2,570.31
6. Step 6: Final answer
   x = 1,920.07