Finding the Fourth Proportional to 11,002.78, 16,503 and 3,105.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,002.78 : 16,503 = 3,105.10 : x
2. Step 2: Convert to fraction form
   11,002.78/16,503 = 3,105.10/x
3. Step 3: Cross multiply
   11,002.78x = 16,503 × 3,105.10
4. Step 4: Simplify right side
   11,002.78x = 51,243,465.30
5. Step 5: Solve for x
   x = 51,243,465.30/11,002.78
6. Step 6: Final answer
   x = 4,657.32