Finding the Fourth Proportional to 31,090.34, 42,903.42 and 16,942.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,090.34 : 42,903.42 = 16,942.88 : x
2. Step 2: Convert to fraction form
   31,090.34/42,903.42 = 16,942.88/x
3. Step 3: Cross multiply
   31,090.34x = 42,903.42 × 16,942.88
4. Step 4: Simplify right side
   31,090.34x = 726,907,496.65
5. Step 5: Solve for x
   x = 726,907,496.65/31,090.34
6. Step 6: Final answer
   x = 23,380.49