Finding the Fourth Proportional to 3,992.80, 5,783.80 and 3,992.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,992.80 : 5,783.80 = 3,992.80 : x
2. Step 2: Convert to fraction form
   3,992.80/5,783.80 = 3,992.80/x
3. Step 3: Cross multiply
   3,992.80x = 5,783.80 × 3,992.80
4. Step 4: Simplify right side
   3,992.80x = 23,093,556.64
5. Step 5: Solve for x
   x = 23,093,556.64/3,992.80
6. Step 6: Final answer
   x = 5,783.80