Finding the Fourth Proportional to 12,629.83, 18,920.49 and 7,066.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,629.83 : 18,920.49 = 7,066.31 : x
2. Step 2: Convert to fraction form
   12,629.83/18,920.49 = 7,066.31/x
3. Step 3: Cross multiply
   12,629.83x = 18,920.49 × 7,066.31
4. Step 4: Simplify right side
   12,629.83x = 133,698,047.69
5. Step 5: Solve for x
   x = 133,698,047.69/12,629.83
6. Step 6: Final answer
   x = 10,585.89