Finding the Fourth Proportional to 11,945.46, 17,911.61 and 5,707.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,945.46 : 17,911.61 = 5,707.05 : x
2. Step 2: Convert to fraction form
   11,945.46/17,911.61 = 5,707.05/x
3. Step 3: Cross multiply
   11,945.46x = 17,911.61 × 5,707.05
4. Step 4: Simplify right side
   11,945.46x = 102,222,453.85
5. Step 5: Solve for x
   x = 102,222,453.85/11,945.46
6. Step 6: Final answer
   x = 8,557.43