Finding the Fourth Proportional to 12,398.22, 17,105.39 and 7,019.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,398.22 : 17,105.39 = 7,019.93 : x
2. Step 2: Convert to fraction form
   12,398.22/17,105.39 = 7,019.93/x
3. Step 3: Cross multiply
   12,398.22x = 17,105.39 × 7,019.93
4. Step 4: Simplify right side
   12,398.22x = 120,078,519.80
5. Step 5: Solve for x
   x = 120,078,519.80/12,398.22
6. Step 6: Final answer
   x = 9,685.14