Finding the Fourth Proportional to 9,418.12, 12,995.89 and 5,589.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,418.12 : 12,995.89 = 5,589.15 : x
2. Step 2: Convert to fraction form
   9,418.12/12,995.89 = 5,589.15/x
3. Step 3: Cross multiply
   9,418.12x = 12,995.89 × 5,589.15
4. Step 4: Simplify right side
   9,418.12x = 72,635,978.59
5. Step 5: Solve for x
   x = 72,635,978.59/9,418.12
6. Step 6: Final answer
   x = 7,712.36