Finding the Fourth Proportional to 9,146.28, 12,621.78 and 5,369.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.28 : 12,621.78 = 5,369.52 : x
2. Step 2: Convert to fraction form
   9,146.28/12,621.78 = 5,369.52/x
3. Step 3: Cross multiply
   9,146.28x = 12,621.78 × 5,369.52
4. Step 4: Simplify right side
   9,146.28x = 67,772,900.15
5. Step 5: Solve for x
   x = 67,772,900.15/9,146.28
6. Step 6: Final answer
   x = 7,409.89