Finding the Fourth Proportional to 11,900.57, 17,850.99 and 5,661.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,900.57 : 17,850.99 = 5,661.18 : x
2. Step 2: Convert to fraction form
   11,900.57/17,850.99 = 5,661.18/x
3. Step 3: Cross multiply
   11,900.57x = 17,850.99 × 5,661.18
4. Step 4: Simplify right side
   11,900.57x = 101,057,667.57
5. Step 5: Solve for x
   x = 101,057,667.57/11,900.57
6. Step 6: Final answer
   x = 8,491.83