Finding the Fourth Proportional to 7,188.28, 10,786.82 and 2,805.77

Step by Step Solution

1. Step 1: Write the proportion equation
   7,188.28 : 10,786.82 = 2,805.77 : x
2. Step 2: Convert to fraction form
   7,188.28/10,786.82 = 2,805.77/x
3. Step 3: Cross multiply
   7,188.28x = 10,786.82 × 2,805.77
4. Step 4: Simplify right side
   7,188.28x = 30,265,348.89
5. Step 5: Solve for x
   x = 30,265,348.89/7,188.28
6. Step 6: Final answer
   x = 4,210.38