Finding the Fourth Proportional to 30,559.82, 42,172.41 and 17,131.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,559.82 : 42,172.41 = 17,131.06 : x
2. Step 2: Convert to fraction form
   30,559.82/42,172.41 = 17,131.06/x
3. Step 3: Cross multiply
   30,559.82x = 42,172.41 × 17,131.06
4. Step 4: Simplify right side
   30,559.82x = 722,458,086.05
5. Step 5: Solve for x
   x = 722,458,086.05/30,559.82
6. Step 6: Final answer
   x = 23,640.78