Finding the Fourth Proportional to 9,579.69, 13,219.85 and 5,387.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,579.69 : 13,219.85 = 5,387.94 : x
2. Step 2: Convert to fraction form
   9,579.69/13,219.85 = 5,387.94/x
3. Step 3: Cross multiply
   9,579.69x = 13,219.85 × 5,387.94
4. Step 4: Simplify right side
   9,579.69x = 71,227,758.61
5. Step 5: Solve for x
   x = 71,227,758.61/9,579.69
6. Step 6: Final answer
   x = 7,435.29