Finding the Fourth Proportional to 2,859.88, 4,290.23 and 1,299.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,859.88 : 4,290.23 = 1,299.87 : x
2. Step 2: Convert to fraction form
   2,859.88/4,290.23 = 1,299.87/x
3. Step 3: Cross multiply
   2,859.88x = 4,290.23 × 1,299.87
4. Step 4: Simplify right side
   2,859.88x = 5,576,741.27
5. Step 5: Solve for x
   x = 5,576,741.27/2,859.88
6. Step 6: Final answer
   x = 1,949.99