Finding the Fourth Proportional to 13,709.82, 18,919.74 and 7,422.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,709.82 : 18,919.74 = 7,422.18 : x
2. Step 2: Convert to fraction form
   13,709.82/18,919.74 = 7,422.18/x
3. Step 3: Cross multiply
   13,709.82x = 18,919.74 × 7,422.18
4. Step 4: Simplify right side
   13,709.82x = 140,425,715.83
5. Step 5: Solve for x
   x = 140,425,715.83/13,709.82
6. Step 6: Final answer
   x = 10,242.71