Finding the Fourth Proportional to 13,319.90, 19,974.04 and 7,078.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,319.90 : 19,974.04 = 7,078.41 : x
2. Step 2: Convert to fraction form
   13,319.90/19,974.04 = 7,078.41/x
3. Step 3: Cross multiply
   13,319.90x = 19,974.04 × 7,078.41
4. Step 4: Simplify right side
   13,319.90x = 141,384,426.78
5. Step 5: Solve for x
   x = 141,384,426.78/13,319.90
6. Step 6: Final answer
   x = 10,614.52