Finding the Fourth Proportional to 30,538.38, 42,142.23 and 17,110.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,538.38 : 42,142.23 = 17,110.20 : x
2. Step 2: Convert to fraction form
   30,538.38/42,142.23 = 17,110.20/x
3. Step 3: Cross multiply
   30,538.38x = 42,142.23 × 17,110.20
4. Step 4: Simplify right side
   30,538.38x = 721,061,983.75
5. Step 5: Solve for x
   x = 721,061,983.75/30,538.38
6. Step 6: Final answer
   x = 23,611.66