Finding the Fourth Proportional to 2,403.78, 3,317.25 and 1,355.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,403.78 : 3,317.25 = 1,355.86 : x
2. Step 2: Convert to fraction form
   2,403.78/3,317.25 = 1,355.86/x
3. Step 3: Cross multiply
   2,403.78x = 3,317.25 × 1,355.86
4. Step 4: Simplify right side
   2,403.78x = 4,497,726.59
5. Step 5: Solve for x
   x = 4,497,726.59/2,403.78
6. Step 6: Final answer
   x = 1,871.11