Finding the Fourth Proportional to 31,089.75, 42,903.87 and 16,942.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,089.75 : 42,903.87 = 16,942.59 : x
2. Step 2: Convert to fraction form
   31,089.75/42,903.87 = 16,942.59/x
3. Step 3: Cross multiply
   31,089.75x = 42,903.87 × 16,942.59
4. Step 4: Simplify right side
   31,089.75x = 726,902,678.82
5. Step 5: Solve for x
   x = 726,902,678.82/31,089.75
6. Step 6: Final answer
   x = 23,380.78