Finding the Fourth Proportional to 9,378.57, 12,944.01 and 5,401.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,378.57 : 12,944.01 = 5,401.98 : x
2. Step 2: Convert to fraction form
   9,378.57/12,944.01 = 5,401.98/x
3. Step 3: Cross multiply
   9,378.57x = 12,944.01 × 5,401.98
4. Step 4: Simplify right side
   9,378.57x = 69,923,283.14
5. Step 5: Solve for x
   x = 69,923,283.14/9,378.57
6. Step 6: Final answer
   x = 7,455.64