Finding the Fourth Proportional to 12,288.89, 18,433.28 and 3,523.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.89 : 18,433.28 = 3,523.74 : x
2. Step 2: Convert to fraction form
   12,288.89/18,433.28 = 3,523.74/x
3. Step 3: Cross multiply
   12,288.89x = 18,433.28 × 3,523.74
4. Step 4: Simplify right side
   12,288.89x = 64,954,068.45
5. Step 5: Solve for x
   x = 64,954,068.45/12,288.89
6. Step 6: Final answer
   x = 5,285.59