Finding the Fourth Proportional to 10,658.57, 14,709.83 and 6,121.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,658.57 : 14,709.83 = 6,121.89 : x
2. Step 2: Convert to fraction form
   10,658.57/14,709.83 = 6,121.89/x
3. Step 3: Cross multiply
   10,658.57x = 14,709.83 × 6,121.89
4. Step 4: Simplify right side
   10,658.57x = 90,051,930.57
5. Step 5: Solve for x
   x = 90,051,930.57/10,658.57
6. Step 6: Final answer
   x = 8,448.79