Finding the Fourth Proportional to 8,179.76, 11,287.71 and 4,642.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,179.76 : 11,287.71 = 4,642.89 : x
2. Step 2: Convert to fraction form
   8,179.76/11,287.71 = 4,642.89/x
3. Step 3: Cross multiply
   8,179.76x = 11,287.71 × 4,642.89
4. Step 4: Simplify right side
   8,179.76x = 52,407,595.88
5. Step 5: Solve for x
   x = 52,407,595.88/8,179.76
6. Step 6: Final answer
   x = 6,406.99