Finding the Fourth Proportional to 8,666.54, 11,959.83 and 4,687.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,666.54 : 11,959.83 = 4,687.69 : x
2. Step 2: Convert to fraction form
   8,666.54/11,959.83 = 4,687.69/x
3. Step 3: Cross multiply
   8,666.54x = 11,959.83 × 4,687.69
4. Step 4: Simplify right side
   8,666.54x = 56,063,915.69
5. Step 5: Solve for x
   x = 56,063,915.69/8,666.54
6. Step 6: Final answer
   x = 6,469.01