Finding the Fourth Proportional to 12,945.04, 17,859.98 and 7,641.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.04 : 17,859.98 = 7,641.16 : x
2. Step 2: Convert to fraction form
   12,945.04/17,859.98 = 7,641.16/x
3. Step 3: Cross multiply
   12,945.04x = 17,859.98 × 7,641.16
4. Step 4: Simplify right side
   12,945.04x = 136,470,939.23
5. Step 5: Solve for x
   x = 136,470,939.23/12,945.04
6. Step 6: Final answer
   x = 10,542.34