Finding the Fourth Proportional to 9,358.52, 12,911.56 and 5,579.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,358.52 : 12,911.56 = 5,579.12 : x
2. Step 2: Convert to fraction form
   9,358.52/12,911.56 = 5,579.12/x
3. Step 3: Cross multiply
   9,358.52x = 12,911.56 × 5,579.12
4. Step 4: Simplify right side
   9,358.52x = 72,035,142.63
5. Step 5: Solve for x
   x = 72,035,142.63/9,358.52
6. Step 6: Final answer
   x = 7,697.28