Finding the Fourth Proportional to 1,355.52, 2,025.42 and 1,078.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.52 : 2,025.42 = 1,078.68 : x
2. Step 2: Convert to fraction form
   1,355.52/2,025.42 = 1,078.68/x
3. Step 3: Cross multiply
   1,355.52x = 2,025.42 × 1,078.68
4. Step 4: Simplify right side
   1,355.52x = 2,184,780.05
5. Step 5: Solve for x
   x = 2,184,780.05/1,355.52
6. Step 6: Final answer
   x = 1,611.77