Finding the Fourth Proportional to 2,139.41, 2,952.59 and 1,299.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.41 : 2,952.59 = 1,299.92 : x
2. Step 2: Convert to fraction form
   2,139.41/2,952.59 = 1,299.92/x
3. Step 3: Cross multiply
   2,139.41x = 2,952.59 × 1,299.92
4. Step 4: Simplify right side
   2,139.41x = 3,838,109.53
5. Step 5: Solve for x
   x = 3,838,109.53/2,139.41
6. Step 6: Final answer
   x = 1,794.01