Finding the Fourth Proportional to 12,419.71, 18,632.18 and 3,653.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,419.71 : 18,632.18 = 3,653.89 : x
2. Step 2: Convert to fraction form
   12,419.71/18,632.18 = 3,653.89/x
3. Step 3: Cross multiply
   12,419.71x = 18,632.18 × 3,653.89
4. Step 4: Simplify right side
   12,419.71x = 68,079,936.18
5. Step 5: Solve for x
   x = 68,079,936.18/12,419.71
6. Step 6: Final answer
   x = 5,481.60