Finding the Fourth Proportional to 3,122.72, 4,682.71 and 1,661.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,122.72 : 4,682.71 = 1,661.53 : x
2. Step 2: Convert to fraction form
   3,122.72/4,682.71 = 1,661.53/x
3. Step 3: Cross multiply
   3,122.72x = 4,682.71 × 1,661.53
4. Step 4: Simplify right side
   3,122.72x = 7,780,453.52
5. Step 5: Solve for x
   x = 7,780,453.52/3,122.72
6. Step 6: Final answer
   x = 2,491.56