Finding the Fourth Proportional to 1,729.55, 2,388.75 and 1,142.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,729.55 : 2,388.75 = 1,142.71 : x
2. Step 2: Convert to fraction form
   1,729.55/2,388.75 = 1,142.71/x
3. Step 3: Cross multiply
   1,729.55x = 2,388.75 × 1,142.71
4. Step 4: Simplify right side
   1,729.55x = 2,729,648.51
5. Step 5: Solve for x
   x = 2,729,648.51/1,729.55
6. Step 6: Final answer
   x = 1,578.24