Finding the Fourth Proportional to 30,540.38, 42,148.42 and 17,111.54

Step by Step Solution

1. Step 1: Write the proportion equation
   30,540.38 : 42,148.42 = 17,111.54 : x
2. Step 2: Convert to fraction form
   30,540.38/42,148.42 = 17,111.54/x
3. Step 3: Cross multiply
   30,540.38x = 42,148.42 × 17,111.54
4. Step 4: Simplify right side
   30,540.38x = 721,224,374.77
5. Step 5: Solve for x
   x = 721,224,374.77/30,540.38
6. Step 6: Final answer
   x = 23,615.44