Finding the Fourth Proportional to 1,380.48, 2,062.83 and 1,049.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.48 : 2,062.83 = 1,049.60 : x
2. Step 2: Convert to fraction form
   1,380.48/2,062.83 = 1,049.60/x
3. Step 3: Cross multiply
   1,380.48x = 2,062.83 × 1,049.60
4. Step 4: Simplify right side
   1,380.48x = 2,165,146.37
5. Step 5: Solve for x
   x = 2,165,146.37/1,380.48
6. Step 6: Final answer
   x = 1,568.40