Finding the Fourth Proportional to 12,940.29, 19,404.36 and 5,442.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.29 : 19,404.36 = 5,442.26 : x
2. Step 2: Convert to fraction form
   12,940.29/19,404.36 = 5,442.26/x
3. Step 3: Cross multiply
   12,940.29x = 19,404.36 × 5,442.26
4. Step 4: Simplify right side
   12,940.29x = 105,603,475.23
5. Step 5: Solve for x
   x = 105,603,475.23/12,940.29
6. Step 6: Final answer
   x = 8,160.83