Finding the Fourth Proportional to 11,519.31, 17,279.22 and 3,199.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,519.31 : 17,279.22 = 3,199.30 : x
2. Step 2: Convert to fraction form
   11,519.31/17,279.22 = 3,199.30/x
3. Step 3: Cross multiply
   11,519.31x = 17,279.22 × 3,199.30
4. Step 4: Simplify right side
   11,519.31x = 55,281,377.35
5. Step 5: Solve for x
   x = 55,281,377.35/11,519.31
6. Step 6: Final answer
   x = 4,799.02