Finding the Fourth Proportional to 8,577.43, 12,880.42 and 5,784.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,577.43 : 12,880.42 = 5,784.26 : x
2. Step 2: Convert to fraction form
   8,577.43/12,880.42 = 5,784.26/x
3. Step 3: Cross multiply
   8,577.43x = 12,880.42 × 5,784.26
4. Step 4: Simplify right side
   8,577.43x = 74,503,619.33
5. Step 5: Solve for x
   x = 74,503,619.33/8,577.43
6. Step 6: Final answer
   x = 8,686.01