Finding the Fourth Proportional to 1,721.35, 2,374.72 and 1,057.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.35 : 2,374.72 = 1,057.96 : x
2. Step 2: Convert to fraction form
   1,721.35/2,374.72 = 1,057.96/x
3. Step 3: Cross multiply
   1,721.35x = 2,374.72 × 1,057.96
4. Step 4: Simplify right side
   1,721.35x = 2,512,359.09
5. Step 5: Solve for x
   x = 2,512,359.09/1,721.35
6. Step 6: Final answer
   x = 1,459.53