Finding the Fourth Proportional to 11,007.10, 16,481.85 and 10,488.70

Step by Step Solution

1. Step 1: Write the proportion equation
   11,007.10 : 16,481.85 = 10,488.70 : x
2. Step 2: Convert to fraction form
   11,007.10/16,481.85 = 10,488.70/x
3. Step 3: Cross multiply
   11,007.10x = 16,481.85 × 10,488.70
4. Step 4: Simplify right side
   11,007.10x = 172,873,180.10
5. Step 5: Solve for x
   x = 172,873,180.10/11,007.10
6. Step 6: Final answer
   x = 15,705.61