Finding the Fourth Proportional to 11,109.60, 16,666.56 and 3,318.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,109.60 : 16,666.56 = 3,318.24 : x
2. Step 2: Convert to fraction form
   11,109.60/16,666.56 = 3,318.24/x
3. Step 3: Cross multiply
   11,109.60x = 16,666.56 × 3,318.24
4. Step 4: Simplify right side
   11,109.60x = 55,303,646.05
5. Step 5: Solve for x
   x = 55,303,646.05/11,109.60
6. Step 6: Final answer
   x = 4,978.01