Finding the Fourth Proportional to 30,938.58, 42,695.25 and 16,791.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,938.58 : 42,695.25 = 16,791.42 : x
2. Step 2: Convert to fraction form
   30,938.58/42,695.25 = 16,791.42/x
3. Step 3: Cross multiply
   30,938.58x = 42,695.25 × 16,791.42
4. Step 4: Simplify right side
   30,938.58x = 716,913,874.76
5. Step 5: Solve for x
   x = 716,913,874.76/30,938.58
6. Step 6: Final answer
   x = 23,172.16