Finding the Fourth Proportional to 13,218.34, 19,821.24 and 7,673.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,218.34 : 19,821.24 = 7,673.38 : x
2. Step 2: Convert to fraction form
   13,218.34/19,821.24 = 7,673.38/x
3. Step 3: Cross multiply
   13,218.34x = 19,821.24 × 7,673.38
4. Step 4: Simplify right side
   13,218.34x = 152,095,906.59
5. Step 5: Solve for x
   x = 152,095,906.59/13,218.34
6. Step 6: Final answer
   x = 11,506.43