Finding the Fourth Proportional to 12,330.56, 18,498.24 and 5,405

Step by Step Solution

1. Step 1: Write the proportion equation
   12,330.56 : 18,498.24 = 5,405 : x
2. Step 2: Convert to fraction form
   12,330.56/18,498.24 = 5,405/x
3. Step 3: Cross multiply
   12,330.56x = 18,498.24 × 5,405
4. Step 4: Simplify right side
   12,330.56x = 99,982,987.20
5. Step 5: Solve for x
   x = 99,982,987.20/12,330.56
6. Step 6: Final answer
   x = 8,108.55