Finding the Fourth Proportional to 8,583.34, 12,874.98 and 5,640.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,583.34 : 12,874.98 = 5,640.34 : x
2. Step 2: Convert to fraction form
   8,583.34/12,874.98 = 5,640.34/x
3. Step 3: Cross multiply
   8,583.34x = 12,874.98 × 5,640.34
4. Step 4: Simplify right side
   8,583.34x = 72,619,264.69
5. Step 5: Solve for x
   x = 72,619,264.69/8,583.34
6. Step 6: Final answer
   x = 8,460.49