Finding the Fourth Proportional to 11,642.42, 17,451.48 and 5,711.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,642.42 : 17,451.48 = 5,711.18 : x
2. Step 2: Convert to fraction form
   11,642.42/17,451.48 = 5,711.18/x
3. Step 3: Cross multiply
   11,642.42x = 17,451.48 × 5,711.18
4. Step 4: Simplify right side
   11,642.42x = 99,668,543.55
5. Step 5: Solve for x
   x = 99,668,543.55/11,642.42
6. Step 6: Final answer
   x = 8,560.81