Finding the Fourth Proportional to 21,268.82, 29,347.55 and 12,769.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,268.82 : 29,347.55 = 12,769.59 : x
2. Step 2: Convert to fraction form
   21,268.82/29,347.55 = 12,769.59/x
3. Step 3: Cross multiply
   21,268.82x = 29,347.55 × 12,769.59
4. Step 4: Simplify right side
   21,268.82x = 374,756,275.10
5. Step 5: Solve for x
   x = 374,756,275.10/21,268.82
6. Step 6: Final answer
   x = 17,619.98