Finding the Fourth Proportional to 5,978.99, 8,216.37 and 5,704.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978.99 : 8,216.37 = 5,704.59 : x
2. Step 2: Convert to fraction form
   5,978.99/8,216.37 = 5,704.59/x
3. Step 3: Cross multiply
   5,978.99x = 8,216.37 × 5,704.59
4. Step 4: Simplify right side
   5,978.99x = 46,871,022.14
5. Step 5: Solve for x
   x = 46,871,022.14/5,978.99
6. Step 6: Final answer
   x = 7,839.29