Finding the Fourth Proportional to 9,360.86, 12,919.68 and 5,586.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,360.86 : 12,919.68 = 5,586.20 : x
2. Step 2: Convert to fraction form
   9,360.86/12,919.68 = 5,586.20/x
3. Step 3: Cross multiply
   9,360.86x = 12,919.68 × 5,586.20
4. Step 4: Simplify right side
   9,360.86x = 72,171,916.42
5. Step 5: Solve for x
   x = 72,171,916.42/9,360.86
6. Step 6: Final answer
   x = 7,709.97