Finding the Fourth Proportional to 8,763.18, 12,093.69 and 8,172.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,763.18 : 12,093.69 = 8,172.69 : x
2. Step 2: Convert to fraction form
   8,763.18/12,093.69 = 8,172.69/x
3. Step 3: Cross multiply
   8,763.18x = 12,093.69 × 8,172.69
4. Step 4: Simplify right side
   8,763.18x = 98,837,979.33
5. Step 5: Solve for x
   x = 98,837,979.33/8,763.18
6. Step 6: Final answer
   x = 11,278.78