Finding the Fourth Proportional to 1,724.79, 2,570.70 and 1,394.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.79 : 2,570.70 = 1,394.31 : x
2. Step 2: Convert to fraction form
   1,724.79/2,570.70 = 1,394.31/x
3. Step 3: Cross multiply
   1,724.79x = 2,570.70 × 1,394.31
4. Step 4: Simplify right side
   1,724.79x = 3,584,352.72
5. Step 5: Solve for x
   x = 3,584,352.72/1,724.79
6. Step 6: Final answer
   x = 2,078.14