Finding the Fourth Proportional to 31,787.48, 43,868.78 and 18,359.30

Step by Step Solution

1. Step 1: Write the proportion equation
   31,787.48 : 43,868.78 = 18,359.30 : x
2. Step 2: Convert to fraction form
   31,787.48/43,868.78 = 18,359.30/x
3. Step 3: Cross multiply
   31,787.48x = 43,868.78 × 18,359.30
4. Step 4: Simplify right side
   31,787.48x = 805,399,781.51
5. Step 5: Solve for x
   x = 805,399,781.51/31,787.48
6. Step 6: Final answer
   x = 25,337.02