Finding the Fourth Proportional to 11,819.61, 17,729.47 and 3,499.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,819.61 : 17,729.47 = 3,499.79 : x
2. Step 2: Convert to fraction form
   11,819.61/17,729.47 = 3,499.79/x
3. Step 3: Cross multiply
   11,819.61x = 17,729.47 × 3,499.79
4. Step 4: Simplify right side
   11,819.61x = 62,049,347.38
5. Step 5: Solve for x
   x = 62,049,347.38/11,819.61
6. Step 6: Final answer
   x = 5,249.69