Finding the Fourth Proportional to 1,725.18, 2,586.82 and 684.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.18 : 2,586.82 = 684.12 : x
2. Step 2: Convert to fraction form
   1,725.18/2,586.82 = 684.12/x
3. Step 3: Cross multiply
   1,725.18x = 2,586.82 × 684.12
4. Step 4: Simplify right side
   1,725.18x = 1,769,695.30
5. Step 5: Solve for x
   x = 1,769,695.30/1,725.18
6. Step 6: Final answer
   x = 1,025.80