Finding the Fourth Proportional to 3,919.46, 5,879.52 and 997.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.46 : 5,879.52 = 997.72 : x
2. Step 2: Convert to fraction form
   3,919.46/5,879.52 = 997.72/x
3. Step 3: Cross multiply
   3,919.46x = 5,879.52 × 997.72
4. Step 4: Simplify right side
   3,919.46x = 5,866,100.00
5. Step 5: Solve for x
   x = 5,866,100.00/3,919.46
6. Step 6: Final answer
   x = 1,496.66