Finding the Fourth Proportional to 2,860.32, 4,290.18 and 1,299.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860.32 : 4,290.18 = 1,299.86 : x
2. Step 2: Convert to fraction form
   2,860.32/4,290.18 = 1,299.86/x
3. Step 3: Cross multiply
   2,860.32x = 4,290.18 × 1,299.86
4. Step 4: Simplify right side
   2,860.32x = 5,576,633.37
5. Step 5: Solve for x
   x = 5,576,633.37/2,860.32
6. Step 6: Final answer
   x = 1,949.65