Finding the Fourth Proportional to 31,684, 43,723.92 and 18,436

Step by Step Solution

1. Step 1: Write the proportion equation
   31,684 : 43,723.92 = 18,436 : x
2. Step 2: Convert to fraction form
   31,684/43,723.92 = 18,436/x
3. Step 3: Cross multiply
   31,684x = 43,723.92 × 18,436
4. Step 4: Simplify right side
   31,684x = 806,094,189.12
5. Step 5: Solve for x
   x = 806,094,189.12/31,684
6. Step 6: Final answer
   x = 25,441.68