Finding the Fourth Proportional to 11,003.67, 16,509.15 and 4,428.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.67 : 16,509.15 = 4,428.09 : x
2. Step 2: Convert to fraction form
   11,003.67/16,509.15 = 4,428.09/x
3. Step 3: Cross multiply
   11,003.67x = 16,509.15 × 4,428.09
4. Step 4: Simplify right side
   11,003.67x = 73,104,002.02
5. Step 5: Solve for x
   x = 73,104,002.02/11,003.67
6. Step 6: Final answer
   x = 6,643.60