Finding the Fourth Proportional to 1,723.98, 2,568.85 and 1,640.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,723.98 : 2,568.85 = 1,640.31 : x
2. Step 2: Convert to fraction form
   1,723.98/2,568.85 = 1,640.31/x
3. Step 3: Cross multiply
   1,723.98x = 2,568.85 × 1,640.31
4. Step 4: Simplify right side
   1,723.98x = 4,213,710.34
5. Step 5: Solve for x
   x = 4,213,710.34/1,723.98
6. Step 6: Final answer
   x = 2,444.18