Finding the Fourth Proportional to 2,131.72, 3,192.90 and 1,719.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.72 : 3,192.90 = 1,719.88 : x
2. Step 2: Convert to fraction form
   2,131.72/3,192.90 = 1,719.88/x
3. Step 3: Cross multiply
   2,131.72x = 3,192.90 × 1,719.88
4. Step 4: Simplify right side
   2,131.72x = 5,491,404.85
5. Step 5: Solve for x
   x = 5,491,404.85/2,131.72
6. Step 6: Final answer
   x = 2,576.04