Finding the Fourth Proportional to 31,123.09, 42,949.59 and 16,975.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.09 : 42,949.59 = 16,975.63 : x
2. Step 2: Convert to fraction form
   31,123.09/42,949.59 = 16,975.63/x
3. Step 3: Cross multiply
   31,123.09x = 42,949.59 × 16,975.63
4. Step 4: Simplify right side
   31,123.09x = 729,096,133.74
5. Step 5: Solve for x
   x = 729,096,133.74/31,123.09
6. Step 6: Final answer
   x = 23,426.22