Finding the Fourth Proportional to 12,419.92, 17,139.41 and 7,043.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,419.92 : 17,139.41 = 7,043.37 : x
2. Step 2: Convert to fraction form
   12,419.92/17,139.41 = 7,043.37/x
3. Step 3: Cross multiply
   12,419.92x = 17,139.41 × 7,043.37
4. Step 4: Simplify right side
   12,419.92x = 120,719,170.99
5. Step 5: Solve for x
   x = 120,719,170.99/12,419.92
6. Step 6: Final answer
   x = 9,719.80