Finding the Fourth Proportional to 12,680.11, 19,023.41 and 7,419.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.11 : 19,023.41 = 7,419.54 : x
2. Step 2: Convert to fraction form
   12,680.11/19,023.41 = 7,419.54/x
3. Step 3: Cross multiply
   12,680.11x = 19,023.41 × 7,419.54
4. Step 4: Simplify right side
   12,680.11x = 141,145,019.46
5. Step 5: Solve for x
   x = 141,145,019.46/12,680.11
6. Step 6: Final answer
   x = 11,131.21