Finding the Fourth Proportional to 1,940.85, 2,678.00 and 1,155.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.85 : 2,678.00 = 1,155.15 : x
2. Step 2: Convert to fraction form
   1,940.85/2,678.00 = 1,155.15/x
3. Step 3: Cross multiply
   1,940.85x = 2,678.00 × 1,155.15
4. Step 4: Simplify right side
   1,940.85x = 3,093,485.92
5. Step 5: Solve for x
   x = 3,093,485.92/1,940.85
6. Step 6: Final answer
   x = 1,593.88