Finding the Fourth Proportional to 11,970.72, 16,514.69 and 7,721.19

Step by Step Solution

1. Step 1: Write the proportion equation
   11,970.72 : 16,514.69 = 7,721.19 : x
2. Step 2: Convert to fraction form
   11,970.72/16,514.69 = 7,721.19/x
3. Step 3: Cross multiply
   11,970.72x = 16,514.69 × 7,721.19
4. Step 4: Simplify right side
   11,970.72x = 127,513,020.68
5. Step 5: Solve for x
   x = 127,513,020.68/11,970.72
6. Step 6: Final answer
   x = 10,652.08