Finding the Fourth Proportional to 11,105.10, 16,651.98 and 3,312.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,105.10 : 16,651.98 = 3,312.90 : x
2. Step 2: Convert to fraction form
   11,105.10/16,651.98 = 3,312.90/x
3. Step 3: Cross multiply
   11,105.10x = 16,651.98 × 3,312.90
4. Step 4: Simplify right side
   11,105.10x = 55,166,344.54
5. Step 5: Solve for x
   x = 55,166,344.54/11,105.10
6. Step 6: Final answer
   x = 4,967.66