Finding the Fourth Proportional to 1,724.34, 2,578.63 and 1,285.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.34 : 2,578.63 = 1,285.89 : x
2. Step 2: Convert to fraction form
   1,724.34/2,578.63 = 1,285.89/x
3. Step 3: Cross multiply
   1,724.34x = 2,578.63 × 1,285.89
4. Step 4: Simplify right side
   1,724.34x = 3,315,838.56
5. Step 5: Solve for x
   x = 3,315,838.56/1,724.34
6. Step 6: Final answer
   x = 1,922.96