Finding the Fourth Proportional to 9,579.76, 13,219.94 and 5,388

Step by Step Solution

1. Step 1: Write the proportion equation
   9,579.76 : 13,219.94 = 5,388 : x
2. Step 2: Convert to fraction form
   9,579.76/13,219.94 = 5,388/x
3. Step 3: Cross multiply
   9,579.76x = 13,219.94 × 5,388
4. Step 4: Simplify right side
   9,579.76x = 71,229,036.72
5. Step 5: Solve for x
   x = 71,229,036.72/9,579.76
6. Step 6: Final answer
   x = 7,435.37