Finding the Fourth Proportional to 11,781.88, 16,257.18 and 7,000.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,781.88 : 16,257.18 = 7,000.05 : x
2. Step 2: Convert to fraction form
   11,781.88/16,257.18 = 7,000.05/x
3. Step 3: Cross multiply
   11,781.88x = 16,257.18 × 7,000.05
4. Step 4: Simplify right side
   11,781.88x = 113,801,078.41
5. Step 5: Solve for x
   x = 113,801,078.41/11,781.88
6. Step 6: Final answer
   x = 9,658.99