Finding the Fourth Proportional to 31,821.23, 43,903.42 and 18,387.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,821.23 : 43,903.42 = 18,387.59 : x
2. Step 2: Convert to fraction form
   31,821.23/43,903.42 = 18,387.59/x
3. Step 3: Cross multiply
   31,821.23x = 43,903.42 × 18,387.59
4. Step 4: Simplify right side
   31,821.23x = 807,278,086.56
5. Step 5: Solve for x
   x = 807,278,086.56/31,821.23
6. Step 6: Final answer
   x = 25,369.17