Finding the Fourth Proportional to 31,628.28, 43,639.83 and 18,885.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,628.28 : 43,639.83 = 18,885.59 : x
2. Step 2: Convert to fraction form
   31,628.28/43,639.83 = 18,885.59/x
3. Step 3: Cross multiply
   31,628.28x = 43,639.83 × 18,885.59
4. Step 4: Simplify right side
   31,628.28x = 824,163,882.50
5. Step 5: Solve for x
   x = 824,163,882.50/31,628.28
6. Step 6: Final answer
   x = 26,057.82