Finding the Fourth Proportional to 11,779.70, 17,671.98 and 5,119.08

Step by Step Solution

1. Step 1: Write the proportion equation
   11,779.70 : 17,671.98 = 5,119.08 : x
2. Step 2: Convert to fraction form
   11,779.70/17,671.98 = 5,119.08/x
3. Step 3: Cross multiply
   11,779.70x = 17,671.98 × 5,119.08
4. Step 4: Simplify right side
   11,779.70x = 90,464,279.38
5. Step 5: Solve for x
   x = 90,464,279.38/11,779.70
6. Step 6: Final answer
   x = 7,679.68