Finding the Fourth Proportional to 3,790.72, 5,687.70 and 2,144.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,790.72 : 5,687.70 = 2,144.80 : x
2. Step 2: Convert to fraction form
   3,790.72/5,687.70 = 2,144.80/x
3. Step 3: Cross multiply
   3,790.72x = 5,687.70 × 2,144.80
4. Step 4: Simplify right side
   3,790.72x = 12,198,978.96
5. Step 5: Solve for x
   x = 12,198,978.96/3,790.72
6. Step 6: Final answer
   x = 3,218.12