Finding the Fourth Proportional to 11,007.72, 16,511.28 and 3,110.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,007.72 : 16,511.28 = 3,110.78 : x
2. Step 2: Convert to fraction form
   11,007.72/16,511.28 = 3,110.78/x
3. Step 3: Cross multiply
   11,007.72x = 16,511.28 × 3,110.78
4. Step 4: Simplify right side
   11,007.72x = 51,362,959.60
5. Step 5: Solve for x
   x = 51,362,959.60/11,007.72
6. Step 6: Final answer
   x = 4,666.09