Finding the Fourth Proportional to 12,945.83, 17,864.55 and 7,280.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.83 : 17,864.55 = 7,280.69 : x
2. Step 2: Convert to fraction form
   12,945.83/17,864.55 = 7,280.69/x
3. Step 3: Cross multiply
   12,945.83x = 17,864.55 × 7,280.69
4. Step 4: Simplify right side
   12,945.83x = 130,066,161.22
5. Step 5: Solve for x
   x = 130,066,161.22/12,945.83
6. Step 6: Final answer
   x = 10,046.96