Finding the Fourth Proportional to 31,089.74, 42,903.69 and 16,942.58

Step by Step Solution

1. Step 1: Write the proportion equation
   31,089.74 : 42,903.69 = 16,942.58 : x
2. Step 2: Convert to fraction form
   31,089.74/42,903.69 = 16,942.58/x
3. Step 3: Cross multiply
   31,089.74x = 42,903.69 × 16,942.58
4. Step 4: Simplify right side
   31,089.74x = 726,899,027.96
5. Step 5: Solve for x
   x = 726,899,027.96/31,089.74
6. Step 6: Final answer
   x = 23,380.68