Finding the Fourth Proportional to 11,817.25, 16,290.61 and 8,454.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,817.25 : 16,290.61 = 8,454.24 : x
2. Step 2: Convert to fraction form
   11,817.25/16,290.61 = 8,454.24/x
3. Step 3: Cross multiply
   11,817.25x = 16,290.61 × 8,454.24
4. Step 4: Simplify right side
   11,817.25x = 137,724,726.69
5. Step 5: Solve for x
   x = 137,724,726.69/11,817.25
6. Step 6: Final answer
   x = 11,654.55