Finding the Fourth Proportional to 8,819.09, 12,155.18 and 8,403.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,819.09 : 12,155.18 = 8,403.86 : x
2. Step 2: Convert to fraction form
   8,819.09/12,155.18 = 8,403.86/x
3. Step 3: Cross multiply
   8,819.09x = 12,155.18 × 8,403.86
4. Step 4: Simplify right side
   8,819.09x = 102,150,482.39
5. Step 5: Solve for x
   x = 102,150,482.39/8,819.09
6. Step 6: Final answer
   x = 11,582.89