Finding the Fourth Proportional to 12,493.24, 17,241.90 and 7,188.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,493.24 : 17,241.90 = 7,188.28 : x
2. Step 2: Convert to fraction form
   12,493.24/17,241.90 = 7,188.28/x
3. Step 3: Cross multiply
   12,493.24x = 17,241.90 × 7,188.28
4. Step 4: Simplify right side
   12,493.24x = 123,939,604.93
5. Step 5: Solve for x
   x = 123,939,604.93/12,493.24
6. Step 6: Final answer
   x = 9,920.53