Finding the Fourth Proportional to 1,724.80, 2,383.68 and 1,284.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.80 : 2,383.68 = 1,284.16 : x
2. Step 2: Convert to fraction form
   1,724.80/2,383.68 = 1,284.16/x
3. Step 3: Cross multiply
   1,724.80x = 2,383.68 × 1,284.16
4. Step 4: Simplify right side
   1,724.80x = 3,061,026.51
5. Step 5: Solve for x
   x = 3,061,026.51/1,724.80
6. Step 6: Final answer
   x = 1,774.71