Finding the Fourth Proportional to 30,559.96, 42,173.90 and 17,131.49

Step by Step Solution

1. Step 1: Write the proportion equation
   30,559.96 : 42,173.90 = 17,131.49 : x
2. Step 2: Convert to fraction form
   30,559.96/42,173.90 = 17,131.49/x
3. Step 3: Cross multiply
   30,559.96x = 42,173.90 × 17,131.49
4. Step 4: Simplify right side
   30,559.96x = 722,501,746.11
5. Step 5: Solve for x
   x = 722,501,746.11/30,559.96
6. Step 6: Final answer
   x = 23,642.10