Finding the Fourth Proportional to 11,822.45, 17,721.69 and 7,665.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,822.45 : 17,721.69 = 7,665.09 : x
2. Step 2: Convert to fraction form
   11,822.45/17,721.69 = 7,665.09/x
3. Step 3: Cross multiply
   11,822.45x = 17,721.69 × 7,665.09
4. Step 4: Simplify right side
   11,822.45x = 135,838,348.80
5. Step 5: Solve for x
   x = 135,838,348.80/11,822.45
6. Step 6: Final answer
   x = 11,489.87