Finding the Fourth Proportional to 31,090.75, 42,905.25 and 16,943.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,090.75 : 42,905.25 = 16,943.59 : x
2. Step 2: Convert to fraction form
   31,090.75/42,905.25 = 16,943.59/x
3. Step 3: Cross multiply
   31,090.75x = 42,905.25 × 16,943.59
4. Step 4: Simplify right side
   31,090.75x = 726,968,964.85
5. Step 5: Solve for x
   x = 726,968,964.85/31,090.75
6. Step 6: Final answer
   x = 23,382.16