Finding the Fourth Proportional to 31,142.89, 42,977.42 and 16,995.43

Step by Step Solution

1. Step 1: Write the proportion equation
   31,142.89 : 42,977.42 = 16,995.43 : x
2. Step 2: Convert to fraction form
   31,142.89/42,977.42 = 16,995.43/x
3. Step 3: Cross multiply
   31,142.89x = 42,977.42 × 16,995.43
4. Step 4: Simplify right side
   31,142.89x = 730,419,733.19
5. Step 5: Solve for x
   x = 730,419,733.19/31,142.89
6. Step 6: Final answer
   x = 23,453.82