Finding the Fourth Proportional to 30,938.37, 42,694.98 and 16,791.22

Step by Step Solution

1. Step 1: Write the proportion equation
   30,938.37 : 42,694.98 = 16,791.22 : x
2. Step 2: Convert to fraction form
   30,938.37/42,694.98 = 16,791.22/x
3. Step 3: Cross multiply
   30,938.37x = 42,694.98 × 16,791.22
4. Step 4: Simplify right side
   30,938.37x = 716,900,695.34
5. Step 5: Solve for x
   x = 716,900,695.34/30,938.37
6. Step 6: Final answer
   x = 23,171.90