Finding the Fourth Proportional to 9,451.69, 13,043.50 and 5,418.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,451.69 : 13,043.50 = 5,418.90 : x
2. Step 2: Convert to fraction form
   9,451.69/13,043.50 = 5,418.90/x
3. Step 3: Cross multiply
   9,451.69x = 13,043.50 × 5,418.90
4. Step 4: Simplify right side
   9,451.69x = 70,681,408.60
5. Step 5: Solve for x
   x = 70,681,408.60/9,451.69
6. Step 6: Final answer
   x = 7,478.18