Finding the Fourth Proportional to 2,153.69, 3,228.96 and 983.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.69 : 3,228.96 = 983.06 : x
2. Step 2: Convert to fraction form
   2,153.69/3,228.96 = 983.06/x
3. Step 3: Cross multiply
   2,153.69x = 3,228.96 × 983.06
4. Step 4: Simplify right side
   2,153.69x = 3,174,245.27
5. Step 5: Solve for x
   x = 3,174,245.27/2,153.69
6. Step 6: Final answer
   x = 1,473.87