Finding the Fourth Proportional to 9,399.06, 12,963.60 and 5,621.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.06 : 12,963.60 = 5,621.94 : x
2. Step 2: Convert to fraction form
   9,399.06/12,963.60 = 5,621.94/x
3. Step 3: Cross multiply
   9,399.06x = 12,963.60 × 5,621.94
4. Step 4: Simplify right side
   9,399.06x = 72,880,581.38
5. Step 5: Solve for x
   x = 72,880,581.38/9,399.06
6. Step 6: Final answer
   x = 7,754.03