Finding the Fourth Proportional to 12,443.18, 18,664.14 and 4,651.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.18 : 18,664.14 = 4,651.38 : x
2. Step 2: Convert to fraction form
   12,443.18/18,664.14 = 4,651.38/x
3. Step 3: Cross multiply
   12,443.18x = 18,664.14 × 4,651.38
4. Step 4: Simplify right side
   12,443.18x = 86,814,007.51
5. Step 5: Solve for x
   x = 86,814,007.51/12,443.18
6. Step 6: Final answer
   x = 6,976.83