Finding the Fourth Proportional to 11,009.78, 16,513.50 and 3,112.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,009.78 : 16,513.50 = 3,112.10 : x
2. Step 2: Convert to fraction form
   11,009.78/16,513.50 = 3,112.10/x
3. Step 3: Cross multiply
   11,009.78x = 16,513.50 × 3,112.10
4. Step 4: Simplify right side
   11,009.78x = 51,391,663.35
5. Step 5: Solve for x
   x = 51,391,663.35/11,009.78
6. Step 6: Final answer
   x = 4,667.82