Finding the Fourth Proportional to 11,885.20, 16,404.33 and 7,906.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,885.20 : 16,404.33 = 7,906.48 : x
2. Step 2: Convert to fraction form
   11,885.20/16,404.33 = 7,906.48/x
3. Step 3: Cross multiply
   11,885.20x = 16,404.33 × 7,906.48
4. Step 4: Simplify right side
   11,885.20x = 129,700,507.06
5. Step 5: Solve for x
   x = 129,700,507.06/11,885.20
6. Step 6: Final answer
   x = 10,912.77