Finding the Fourth Proportional to 12,821.34, 17,693.88 and 7,443.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,821.34 : 17,693.88 = 7,443.36 : x
2. Step 2: Convert to fraction form
   12,821.34/17,693.88 = 7,443.36/x
3. Step 3: Cross multiply
   12,821.34x = 17,693.88 × 7,443.36
4. Step 4: Simplify right side
   12,821.34x = 131,701,918.64
5. Step 5: Solve for x
   x = 131,701,918.64/12,821.34
6. Step 6: Final answer
   x = 10,272.09