Finding the Fourth Proportional to 5,711.89, 8,570.98 and 2,790.22

Step by Step Solution

1. Step 1: Write the proportion equation
   5,711.89 : 8,570.98 = 2,790.22 : x
2. Step 2: Convert to fraction form
   5,711.89/8,570.98 = 2,790.22/x
3. Step 3: Cross multiply
   5,711.89x = 8,570.98 × 2,790.22
4. Step 4: Simplify right side
   5,711.89x = 23,914,919.82
5. Step 5: Solve for x
   x = 23,914,919.82/5,711.89
6. Step 6: Final answer
   x = 4,186.87