Finding the Fourth Proportional to 2,139.69, 2,951.95 and 1,299.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.69 : 2,951.95 = 1,299.82 : x
2. Step 2: Convert to fraction form
   2,139.69/2,951.95 = 1,299.82/x
3. Step 3: Cross multiply
   2,139.69x = 2,951.95 × 1,299.82
4. Step 4: Simplify right side
   2,139.69x = 3,837,003.65
5. Step 5: Solve for x
   x = 3,837,003.65/2,139.69
6. Step 6: Final answer
   x = 1,793.25