Finding the Fourth Proportional to 5,579.31, 7,696.56 and 3,786.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,579.31 : 7,696.56 = 3,786.18 : x
2. Step 2: Convert to fraction form
   5,579.31/7,696.56 = 3,786.18/x
3. Step 3: Cross multiply
   5,579.31x = 7,696.56 × 3,786.18
4. Step 4: Simplify right side
   5,579.31x = 29,140,561.54
5. Step 5: Solve for x
   x = 29,140,561.54/5,579.31
6. Step 6: Final answer
   x = 5,222.97