Finding the Fourth Proportional to 31,722.98, 43,777.69 and 18,294.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,722.98 : 43,777.69 = 18,294.05 : x
2. Step 2: Convert to fraction form
   31,722.98/43,777.69 = 18,294.05/x
3. Step 3: Cross multiply
   31,722.98x = 43,777.69 × 18,294.05
4. Step 4: Simplify right side
   31,722.98x = 800,871,313.45
5. Step 5: Solve for x
   x = 800,871,313.45/31,722.98
6. Step 6: Final answer
   x = 25,245.78