Finding the Fourth Proportional to 11,739.39, 17,609.90 and 3,419.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,739.39 : 17,609.90 = 3,419.48 : x
2. Step 2: Convert to fraction form
   11,739.39/17,609.90 = 3,419.48/x
3. Step 3: Cross multiply
   11,739.39x = 17,609.90 × 3,419.48
4. Step 4: Simplify right side
   11,739.39x = 60,216,595.71
5. Step 5: Solve for x
   x = 60,216,595.71/11,739.39
6. Step 6: Final answer
   x = 5,129.45