Finding the Fourth Proportional to 31,089.48, 42,903.42 and 16,942.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,089.48 : 42,903.42 = 16,942.28 : x
2. Step 2: Convert to fraction form
   31,089.48/42,903.42 = 16,942.28/x
3. Step 3: Cross multiply
   31,089.48x = 42,903.42 × 16,942.28
4. Step 4: Simplify right side
   31,089.48x = 726,881,754.60
5. Step 5: Solve for x
   x = 726,881,754.60/31,089.48
6. Step 6: Final answer
   x = 23,380.31