Finding the Fourth Proportional to 2,662.69, 3,987.88 and 2,570.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.69 : 3,987.88 = 2,570.42 : x
2. Step 2: Convert to fraction form
   2,662.69/3,987.88 = 2,570.42/x
3. Step 3: Cross multiply
   2,662.69x = 3,987.88 × 2,570.42
4. Step 4: Simplify right side
   2,662.69x = 10,250,513.66
5. Step 5: Solve for x
   x = 10,250,513.66/2,662.69
6. Step 6: Final answer
   x = 3,849.69