Finding the Fourth Proportional to 9,194.48, 12,689.31 and 5,418.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,194.48 : 12,689.31 = 5,418.81 : x
2. Step 2: Convert to fraction form
   9,194.48/12,689.31 = 5,418.81/x
3. Step 3: Cross multiply
   9,194.48x = 12,689.31 × 5,418.81
4. Step 4: Simplify right side
   9,194.48x = 68,760,959.92
5. Step 5: Solve for x
   x = 68,760,959.92/9,194.48
6. Step 6: Final answer
   x = 7,478.51