Finding the Fourth Proportional to 2,068.48, 2,855.04 and 1,369.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.48 : 2,855.04 = 1,369.60 : x
2. Step 2: Convert to fraction form
   2,068.48/2,855.04 = 1,369.60/x
3. Step 3: Cross multiply
   2,068.48x = 2,855.04 × 1,369.60
4. Step 4: Simplify right side
   2,068.48x = 3,910,262.78
5. Step 5: Solve for x
   x = 3,910,262.78/2,068.48
6. Step 6: Final answer
   x = 1,890.40