Finding the Fourth Proportional to 31,090.25, 42,904.56 and 16,943.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,090.25 : 42,904.56 = 16,943.09 : x
2. Step 2: Convert to fraction form
   31,090.25/42,904.56 = 16,943.09/x
3. Step 3: Cross multiply
   31,090.25x = 42,904.56 × 16,943.09
4. Step 4: Simplify right side
   31,090.25x = 726,935,821.49
5. Step 5: Solve for x
   x = 726,935,821.49/31,090.25
6. Step 6: Final answer
   x = 23,381.47