Finding the Fourth Proportional to 12,306.54, 18,457.73 and 3,539.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,306.54 : 18,457.73 = 3,539.42 : x
2. Step 2: Convert to fraction form
   12,306.54/18,457.73 = 3,539.42/x
3. Step 3: Cross multiply
   12,306.54x = 18,457.73 × 3,539.42
4. Step 4: Simplify right side
   12,306.54x = 65,329,658.72
5. Step 5: Solve for x
   x = 65,329,658.72/12,306.54
6. Step 6: Final answer
   x = 5,308.53