Finding the Fourth Proportional to 12,945.04, 17,864.16 and 7,357.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.04 : 17,864.16 = 7,357.12 : x
2. Step 2: Convert to fraction form
   12,945.04/17,864.16 = 7,357.12/x
3. Step 3: Cross multiply
   12,945.04x = 17,864.16 × 7,357.12
4. Step 4: Simplify right side
   12,945.04x = 131,428,768.82
5. Step 5: Solve for x
   x = 131,428,768.82/12,945.04
6. Step 6: Final answer
   x = 10,152.83