Finding the Fourth Proportional to 8,815.83, 12,155.35 and 8,072.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,815.83 : 12,155.35 = 8,072.25 : x
2. Step 2: Convert to fraction form
   8,815.83/12,155.35 = 8,072.25/x
3. Step 3: Cross multiply
   8,815.83x = 12,155.35 × 8,072.25
4. Step 4: Simplify right side
   8,815.83x = 98,121,024.04
5. Step 5: Solve for x
   x = 98,121,024.04/8,815.83
6. Step 6: Final answer
   x = 11,130.09