Finding the Fourth Proportional to 30,887.82, 42,636.06 and 18,788.49

Step by Step Solution

1. Step 1: Write the proportion equation
   30,887.82 : 42,636.06 = 18,788.49 : x
2. Step 2: Convert to fraction form
   30,887.82/42,636.06 = 18,788.49/x
3. Step 3: Cross multiply
   30,887.82x = 42,636.06 × 18,788.49
4. Step 4: Simplify right side
   30,887.82x = 801,067,186.95
5. Step 5: Solve for x
   x = 801,067,186.95/30,887.82
6. Step 6: Final answer
   x = 25,934.73