Finding the Fourth Proportional to 12,118.72, 18,152.56 and 5,550.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,118.72 : 18,152.56 = 5,550.43 : x
2. Step 2: Convert to fraction form
   12,118.72/18,152.56 = 5,550.43/x
3. Step 3: Cross multiply
   12,118.72x = 18,152.56 × 5,550.43
4. Step 4: Simplify right side
   12,118.72x = 100,754,395.09
5. Step 5: Solve for x
   x = 100,754,395.09/12,118.72
6. Step 6: Final answer
   x = 8,313.95