Finding the Fourth Proportional to 12,291.48, 18,439.56 and 4,500.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,291.48 : 18,439.56 = 4,500.72 : x
2. Step 2: Convert to fraction form
   12,291.48/18,439.56 = 4,500.72/x
3. Step 3: Cross multiply
   12,291.48x = 18,439.56 × 4,500.72
4. Step 4: Simplify right side
   12,291.48x = 82,991,296.48
5. Step 5: Solve for x
   x = 82,991,296.48/12,291.48
6. Step 6: Final answer
   x = 6,751.94