Finding the Fourth Proportional to 5,570.79, 8,355.25 and 2,609.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,570.79 : 8,355.25 = 2,609.55 : x
2. Step 2: Convert to fraction form
   5,570.79/8,355.25 = 2,609.55/x
3. Step 3: Cross multiply
   5,570.79x = 8,355.25 × 2,609.55
4. Step 4: Simplify right side
   5,570.79x = 21,803,429.59
5. Step 5: Solve for x
   x = 21,803,429.59/5,570.79
6. Step 6: Final answer
   x = 3,913.88