Finding the Fourth Proportional to 12,456.89, 17,189.93 and 7,424.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.89 : 17,189.93 = 7,424.45 : x
2. Step 2: Convert to fraction form
   12,456.89/17,189.93 = 7,424.45/x
3. Step 3: Cross multiply
   12,456.89x = 17,189.93 × 7,424.45
4. Step 4: Simplify right side
   12,456.89x = 127,625,738.67
5. Step 5: Solve for x
   x = 127,625,738.67/12,456.89
6. Step 6: Final answer
   x = 10,245.39