Finding the Fourth Proportional to 9,362.56, 12,920.88 and 5,384.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.56 : 12,920.88 = 5,384.80 : x
2. Step 2: Convert to fraction form
   9,362.56/12,920.88 = 5,384.80/x
3. Step 3: Cross multiply
   9,362.56x = 12,920.88 × 5,384.80
4. Step 4: Simplify right side
   9,362.56x = 69,576,354.62
5. Step 5: Solve for x
   x = 69,576,354.62/9,362.56
6. Step 6: Final answer
   x = 7,431.34