Finding the Fourth Proportional to 9,378.89, 12,944.09 and 5,400.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,378.89 : 12,944.09 = 5,400.17 : x
2. Step 2: Convert to fraction form
   9,378.89/12,944.09 = 5,400.17/x
3. Step 3: Cross multiply
   9,378.89x = 12,944.09 × 5,400.17
4. Step 4: Simplify right side
   9,378.89x = 69,900,286.50
5. Step 5: Solve for x
   x = 69,900,286.50/9,378.89
6. Step 6: Final answer
   x = 7,452.94