Finding the Fourth Proportional to 31,090.28, 42,903.50 and 16,942.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,090.28 : 42,903.50 = 16,942.84 : x
2. Step 2: Convert to fraction form
   31,090.28/42,903.50 = 16,942.84/x
3. Step 3: Cross multiply
   31,090.28x = 42,903.50 × 16,942.84
4. Step 4: Simplify right side
   31,090.28x = 726,907,135.94
5. Step 5: Solve for x
   x = 726,907,135.94/31,090.28
6. Step 6: Final answer
   x = 23,380.53