Finding the Fourth Proportional to 1,293.69, 1,785.91 and 1,013.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293.69 : 1,785.91 = 1,013.43 : x
2. Step 2: Convert to fraction form
   1,293.69/1,785.91 = 1,013.43/x
3. Step 3: Cross multiply
   1,293.69x = 1,785.91 × 1,013.43
4. Step 4: Simplify right side
   1,293.69x = 1,809,894.77
5. Step 5: Solve for x
   x = 1,809,894.77/1,293.69
6. Step 6: Final answer
   x = 1,399.02