Finding the Fourth Proportional to 3,990.31, 5,983.91 and 1,650.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990.31 : 5,983.91 = 1,650.69 : x
2. Step 2: Convert to fraction form
   3,990.31/5,983.91 = 1,650.69/x
3. Step 3: Cross multiply
   3,990.31x = 5,983.91 × 1,650.69
4. Step 4: Simplify right side
   3,990.31x = 9,877,578.33
5. Step 5: Solve for x
   x = 9,877,578.33/3,990.31
6. Step 6: Final answer
   x = 2,475.39