Finding the Fourth Proportional to 1,359.81, 1,862.48 and 1,280.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.81 : 1,862.48 = 1,280.02 : x
2. Step 2: Convert to fraction form
   1,359.81/1,862.48 = 1,280.02/x
3. Step 3: Cross multiply
   1,359.81x = 1,862.48 × 1,280.02
4. Step 4: Simplify right side
   1,359.81x = 2,384,011.65
5. Step 5: Solve for x
   x = 2,384,011.65/1,359.81
6. Step 6: Final answer
   x = 1,753.19