Finding the Fourth Proportional to 30,938.87, 42,698.41 and 18,185.67

Step by Step Solution

1. Step 1: Write the proportion equation
   30,938.87 : 42,698.41 = 18,185.67 : x
2. Step 2: Convert to fraction form
   30,938.87/42,698.41 = 18,185.67/x
3. Step 3: Cross multiply
   30,938.87x = 42,698.41 × 18,185.67
4. Step 4: Simplify right side
   30,938.87x = 776,499,148.32
5. Step 5: Solve for x
   x = 776,499,148.32/30,938.87
6. Step 6: Final answer
   x = 25,097.85