Finding the Fourth Proportional to 31,086.05, 42,898.71 and 16,938.89

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086.05 : 42,898.71 = 16,938.89 : x
2. Step 2: Convert to fraction form
   31,086.05/42,898.71 = 16,938.89/x
3. Step 3: Cross multiply
   31,086.05x = 42,898.71 × 16,938.89
4. Step 4: Simplify right side
   31,086.05x = 726,656,315.34
5. Step 5: Solve for x
   x = 726,656,315.34/31,086.05
6. Step 6: Final answer
   x = 23,375.64