Finding the Fourth Proportional to 5,783.30, 7,976.83 and 3,991.46

Step by Step Solution

1. Step 1: Write the proportion equation
   5,783.30 : 7,976.83 = 3,991.46 : x
2. Step 2: Convert to fraction form
   5,783.30/7,976.83 = 3,991.46/x
3. Step 3: Cross multiply
   5,783.30x = 7,976.83 × 3,991.46
4. Step 4: Simplify right side
   5,783.30x = 31,839,197.87
5. Step 5: Solve for x
   x = 31,839,197.87/5,783.30
6. Step 6: Final answer
   x = 5,505.37