Finding the Fourth Proportional to 1,721.81, 2,375.89 and 1,013.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.81 : 2,375.89 = 1,013.87 : x
2. Step 2: Convert to fraction form
   1,721.81/2,375.89 = 1,013.87/x
3. Step 3: Cross multiply
   1,721.81x = 2,375.89 × 1,013.87
4. Step 4: Simplify right side
   1,721.81x = 2,408,843.59
5. Step 5: Solve for x
   x = 2,408,843.59/1,721.81
6. Step 6: Final answer
   x = 1,399.02