Finding the Fourth Proportional to 31,606.80, 43,618.71 and 18,178.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,606.80 : 43,618.71 = 18,178.06 : x
2. Step 2: Convert to fraction form
   31,606.80/43,618.71 = 18,178.06/x
3. Step 3: Cross multiply
   31,606.80x = 43,618.71 × 18,178.06
4. Step 4: Simplify right side
   31,606.80x = 792,903,436.61
5. Step 5: Solve for x
   x = 792,903,436.61/31,606.80
6. Step 6: Final answer
   x = 25,086.49