Finding the Fourth Proportional to 13,026.51, 17,974.98 and 7,721.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,026.51 : 17,974.98 = 7,721.82 : x
2. Step 2: Convert to fraction form
   13,026.51/17,974.98 = 7,721.82/x
3. Step 3: Cross multiply
   13,026.51x = 17,974.98 × 7,721.82
4. Step 4: Simplify right side
   13,026.51x = 138,799,560.06
5. Step 5: Solve for x
   x = 138,799,560.06/13,026.51
6. Step 6: Final answer
   x = 10,655.16