Finding the Fourth Proportional to 11,690.58, 16,128.39 and 7,440.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,690.58 : 16,128.39 = 7,440.54 : x
2. Step 2: Convert to fraction form
   11,690.58/16,128.39 = 7,440.54/x
3. Step 3: Cross multiply
   11,690.58x = 16,128.39 × 7,440.54
4. Step 4: Simplify right side
   11,690.58x = 120,003,930.93
5. Step 5: Solve for x
   x = 120,003,930.93/11,690.58
6. Step 6: Final answer
   x = 10,265.01