Finding the Fourth Proportional to 1,724.83, 2,588.56 and 1,392.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.83 : 2,588.56 = 1,392.05 : x
2. Step 2: Convert to fraction form
   1,724.83/2,588.56 = 1,392.05/x
3. Step 3: Cross multiply
   1,724.83x = 2,588.56 × 1,392.05
4. Step 4: Simplify right side
   1,724.83x = 3,603,407.94
5. Step 5: Solve for x
   x = 3,603,407.94/1,724.83
6. Step 6: Final answer
   x = 2,089.14