Finding the Fourth Proportional to 2,479.69, 3,422.07 and 1,431.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.69 : 3,422.07 = 1,431.75 : x
2. Step 2: Convert to fraction form
   2,479.69/3,422.07 = 1,431.75/x
3. Step 3: Cross multiply
   2,479.69x = 3,422.07 × 1,431.75
4. Step 4: Simplify right side
   2,479.69x = 4,899,548.72
5. Step 5: Solve for x
   x = 4,899,548.72/2,479.69
6. Step 6: Final answer
   x = 1,975.87