Finding the Fourth Proportional to 9,118.71, 12,589.25 and 5,980.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118.71 : 12,589.25 = 5,980.37 : x
2. Step 2: Convert to fraction form
   9,118.71/12,589.25 = 5,980.37/x
3. Step 3: Cross multiply
   9,118.71x = 12,589.25 × 5,980.37
4. Step 4: Simplify right side
   9,118.71x = 75,288,280.17
5. Step 5: Solve for x
   x = 75,288,280.17/9,118.71
6. Step 6: Final answer
   x = 8,256.46