Finding the Fourth Proportional to 10,179.46, 14,042.72 and 8,389.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,179.46 : 14,042.72 = 8,389.76 : x
2. Step 2: Convert to fraction form
   10,179.46/14,042.72 = 8,389.76/x
3. Step 3: Cross multiply
   10,179.46x = 14,042.72 × 8,389.76
4. Step 4: Simplify right side
   10,179.46x = 117,815,050.55
5. Step 5: Solve for x
   x = 117,815,050.55/10,179.46
6. Step 6: Final answer
   x = 11,573.81