Finding the Fourth Proportional to 3,061.40, 4,589.52 and 1,328.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.40 : 4,589.52 = 1,328.72 : x
2. Step 2: Convert to fraction form
   3,061.40/4,589.52 = 1,328.72/x
3. Step 3: Cross multiply
   3,061.40x = 4,589.52 × 1,328.72
4. Step 4: Simplify right side
   3,061.40x = 6,098,187.01
5. Step 5: Solve for x
   x = 6,098,187.01/3,061.40
6. Step 6: Final answer
   x = 1,991.96