Finding the Fourth Proportional to 12,288.30, 18,431.83 and 4,496.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.30 : 18,431.83 = 4,496.50 : x
2. Step 2: Convert to fraction form
   12,288.30/18,431.83 = 4,496.50/x
3. Step 3: Cross multiply
   12,288.30x = 18,431.83 × 4,496.50
4. Step 4: Simplify right side
   12,288.30x = 82,878,723.60
5. Step 5: Solve for x
   x = 82,878,723.60/12,288.30
6. Step 6: Final answer
   x = 6,744.52