Finding the Fourth Proportional to 2,131.35, 3,196.77 and 571.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.35 : 3,196.77 = 571.47 : x
2. Step 2: Convert to fraction form
   2,131.35/3,196.77 = 571.47/x
3. Step 3: Cross multiply
   2,131.35x = 3,196.77 × 571.47
4. Step 4: Simplify right side
   2,131.35x = 1,826,858.15
5. Step 5: Solve for x
   x = 1,826,858.15/2,131.35
6. Step 6: Final answer
   x = 857.14