Finding the Fourth Proportional to 13,758.38, 18,987 and 7,789.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,758.38 : 18,987 = 7,789.94 : x
2. Step 2: Convert to fraction form
   13,758.38/18,987 = 7,789.94/x
3. Step 3: Cross multiply
   13,758.38x = 18,987 × 7,789.94
4. Step 4: Simplify right side
   13,758.38x = 147,907,590.78
5. Step 5: Solve for x
   x = 147,907,590.78/13,758.38
6. Step 6: Final answer
   x = 10,750.36