Finding the Fourth Proportional to 1,724.31, 2,582.88 and 1,431.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.31 : 2,582.88 = 1,431.12 : x
2. Step 2: Convert to fraction form
   1,724.31/2,582.88 = 1,431.12/x
3. Step 3: Cross multiply
   1,724.31x = 2,582.88 × 1,431.12
4. Step 4: Simplify right side
   1,724.31x = 3,696,411.23
5. Step 5: Solve for x
   x = 3,696,411.23/1,724.31
6. Step 6: Final answer
   x = 2,143.70