Finding the Fourth Proportional to 12,940.34, 19,418.03 and 5,443.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.34 : 19,418.03 = 5,443.35 : x
2. Step 2: Convert to fraction form
   12,940.34/19,418.03 = 5,443.35/x
3. Step 3: Cross multiply
   12,940.34x = 19,418.03 × 5,443.35
4. Step 4: Simplify right side
   12,940.34x = 105,699,053.98
5. Step 5: Solve for x
   x = 105,699,053.98/12,940.34
6. Step 6: Final answer
   x = 8,168.19