Finding the Fourth Proportional to 9,323.94, 13,979.88 and 3,990.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,323.94 : 13,979.88 = 3,990.59 : x
2. Step 2: Convert to fraction form
   9,323.94/13,979.88 = 3,990.59/x
3. Step 3: Cross multiply
   9,323.94x = 13,979.88 × 3,990.59
4. Step 4: Simplify right side
   9,323.94x = 55,788,002.40
5. Step 5: Solve for x
   x = 55,788,002.40/9,323.94
6. Step 6: Final answer
   x = 5,983.31