Finding the Fourth Proportional to 3,298.56, 4,945.92 and 989.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,298.56 : 4,945.92 = 989.76 : x
2. Step 2: Convert to fraction form
   3,298.56/4,945.92 = 989.76/x
3. Step 3: Cross multiply
   3,298.56x = 4,945.92 × 989.76
4. Step 4: Simplify right side
   3,298.56x = 4,895,273.78
5. Step 5: Solve for x
   x = 4,895,273.78/3,298.56
6. Step 6: Final answer
   x = 1,484.06