Finding the Fourth Proportional to 1,724.22, 2,584.89 and 697.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.22 : 2,584.89 = 697.50 : x
2. Step 2: Convert to fraction form
   1,724.22/2,584.89 = 697.50/x
3. Step 3: Cross multiply
   1,724.22x = 2,584.89 × 697.50
4. Step 4: Simplify right side
   1,724.22x = 1,802,960.78
5. Step 5: Solve for x
   x = 1,802,960.78/1,724.22
6. Step 6: Final answer
   x = 1,045.67