Finding the Fourth Proportional to 9,142.29, 12,620.75 and 5,786.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.29 : 12,620.75 = 5,786.73 : x
2. Step 2: Convert to fraction form
   9,142.29/12,620.75 = 5,786.73/x
3. Step 3: Cross multiply
   9,142.29x = 12,620.75 × 5,786.73
4. Step 4: Simplify right side
   9,142.29x = 73,032,872.65
5. Step 5: Solve for x
   x = 73,032,872.65/9,142.29
6. Step 6: Final answer
   x = 7,988.47