Finding the Fourth Proportional to 1,721.69, 2,375.90 and 1,004.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.69 : 2,375.90 = 1,004.01 : x
2. Step 2: Convert to fraction form
   1,721.69/2,375.90 = 1,004.01/x
3. Step 3: Cross multiply
   1,721.69x = 2,375.90 × 1,004.01
4. Step 4: Simplify right side
   1,721.69x = 2,385,419.77
5. Step 5: Solve for x
   x = 2,385,419.77/1,721.69
6. Step 6: Final answer
   x = 1,385.51