Finding the Fourth Proportional to 9,357.83, 12,911.30 and 5,579.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,357.83 : 12,911.30 = 5,579.28 : x
2. Step 2: Convert to fraction form
   9,357.83/12,911.30 = 5,579.28/x
3. Step 3: Cross multiply
   9,357.83x = 12,911.30 × 5,579.28
4. Step 4: Simplify right side
   9,357.83x = 72,035,750.89
5. Step 5: Solve for x
   x = 72,035,750.89/9,357.83
6. Step 6: Final answer
   x = 7,697.91