Finding the Fourth Proportional to 2,142.72, 3,198.24 and 2,127.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.72 : 3,198.24 = 2,127.60 : x
2. Step 2: Convert to fraction form
   2,142.72/3,198.24 = 2,127.60/x
3. Step 3: Cross multiply
   2,142.72x = 3,198.24 × 2,127.60
4. Step 4: Simplify right side
   2,142.72x = 6,804,575.42
5. Step 5: Solve for x
   x = 6,804,575.42/2,142.72
6. Step 6: Final answer
   x = 3,175.67