Finding the Fourth Proportional to 12,111.12, 18,160.56 and 5,541.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.12 : 18,160.56 = 5,541.93 : x
2. Step 2: Convert to fraction form
   12,111.12/18,160.56 = 5,541.93/x
3. Step 3: Cross multiply
   12,111.12x = 18,160.56 × 5,541.93
4. Step 4: Simplify right side
   12,111.12x = 100,644,552.28
5. Step 5: Solve for x
   x = 100,644,552.28/12,111.12
6. Step 6: Final answer
   x = 8,310.09