Finding the Fourth Proportional to 9,042.26, 12,479.55 and 5,457.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.26 : 12,479.55 = 5,457.41 : x
2. Step 2: Convert to fraction form
   9,042.26/12,479.55 = 5,457.41/x
3. Step 3: Cross multiply
   9,042.26x = 12,479.55 × 5,457.41
4. Step 4: Simplify right side
   9,042.26x = 68,105,958.57
5. Step 5: Solve for x
   x = 68,105,958.57/9,042.26
6. Step 6: Final answer
   x = 7,531.97