Finding the Fourth Proportional to 11,819.12, 17,732.72 and 7,431.44

Step by Step Solution

1. Step 1: Write the proportion equation
   11,819.12 : 17,732.72 = 7,431.44 : x
2. Step 2: Convert to fraction form
   11,819.12/17,732.72 = 7,431.44/x
3. Step 3: Cross multiply
   11,819.12x = 17,732.72 × 7,431.44
4. Step 4: Simplify right side
   11,819.12x = 131,779,644.72
5. Step 5: Solve for x
   x = 131,779,644.72/11,819.12
6. Step 6: Final answer
   x = 11,149.70