Finding the Fourth Proportional to 31,819.71, 43,901.33 and 18,386.07

Step by Step Solution

1. Step 1: Write the proportion equation
   31,819.71 : 43,901.33 = 18,386.07 : x
2. Step 2: Convert to fraction form
   31,819.71/43,901.33 = 18,386.07/x
3. Step 3: Cross multiply
   31,819.71x = 43,901.33 × 18,386.07
4. Step 4: Simplify right side
   31,819.71x = 807,172,669.91
5. Step 5: Solve for x
   x = 807,172,669.91/31,819.71
6. Step 6: Final answer
   x = 25,367.06