Finding the Fourth Proportional to 1,726.40, 2,587.27 and 1,238.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,726.40 : 2,587.27 = 1,238.37 : x
2. Step 2: Convert to fraction form
   1,726.40/2,587.27 = 1,238.37/x
3. Step 3: Cross multiply
   1,726.40x = 2,587.27 × 1,238.37
4. Step 4: Simplify right side
   1,726.40x = 3,203,997.55
5. Step 5: Solve for x
   x = 3,203,997.55/1,726.40
6. Step 6: Final answer
   x = 1,855.88