Finding the Fourth Proportional to 3,986.22, 5,978.91 and 1,064.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.22 : 5,978.91 = 1,064.82 : x
2. Step 2: Convert to fraction form
   3,986.22/5,978.91 = 1,064.82/x
3. Step 3: Cross multiply
   3,986.22x = 5,978.91 × 1,064.82
4. Step 4: Simplify right side
   3,986.22x = 6,366,462.95
5. Step 5: Solve for x
   x = 6,366,462.95/3,986.22
6. Step 6: Final answer
   x = 1,597.12