Finding the Fourth Proportional to 13,618.78, 18,792.83 and 7,650.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,618.78 : 18,792.83 = 7,650.25 : x
2. Step 2: Convert to fraction form
   13,618.78/18,792.83 = 7,650.25/x
3. Step 3: Cross multiply
   13,618.78x = 18,792.83 × 7,650.25
4. Step 4: Simplify right side
   13,618.78x = 143,769,819.85
5. Step 5: Solve for x
   x = 143,769,819.85/13,618.78
6. Step 6: Final answer
   x = 10,556.73