Finding the Fourth Proportional to 31,426.79, 43,369.70 and 17,087.43

Step by Step Solution

1. Step 1: Write the proportion equation
   31,426.79 : 43,369.70 = 17,087.43 : x
2. Step 2: Convert to fraction form
   31,426.79/43,369.70 = 17,087.43/x
3. Step 3: Cross multiply
   31,426.79x = 43,369.70 × 17,087.43
4. Step 4: Simplify right side
   31,426.79x = 741,076,864.01
5. Step 5: Solve for x
   x = 741,076,864.01/31,426.79
6. Step 6: Final answer
   x = 23,581.06