Finding the Fourth Proportional to 1,721.35, 2,375.28 and 1,013.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.35 : 2,375.28 = 1,013.15 : x
2. Step 2: Convert to fraction form
   1,721.35/2,375.28 = 1,013.15/x
3. Step 3: Cross multiply
   1,721.35x = 2,375.28 × 1,013.15
4. Step 4: Simplify right side
   1,721.35x = 2,406,517.76
5. Step 5: Solve for x
   x = 2,406,517.76/1,721.35
6. Step 6: Final answer
   x = 1,398.04