Finding the Fourth Proportional to 13,709.69, 18,919.37 and 7,422.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,709.69 : 18,919.37 = 7,422.06 : x
2. Step 2: Convert to fraction form
   13,709.69/18,919.37 = 7,422.06/x
3. Step 3: Cross multiply
   13,709.69x = 18,919.37 × 7,422.06
4. Step 4: Simplify right side
   13,709.69x = 140,420,690.02
5. Step 5: Solve for x
   x = 140,420,690.02/13,709.69
6. Step 6: Final answer
   x = 10,242.44