Finding the Fourth Proportional to 8,580.34, 12,870.48 and 5,637.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,580.34 : 12,870.48 = 5,637.34 : x
2. Step 2: Convert to fraction form
   8,580.34/12,870.48 = 5,637.34/x
3. Step 3: Cross multiply
   8,580.34x = 12,870.48 × 5,637.34
4. Step 4: Simplify right side
   8,580.34x = 72,555,271.72
5. Step 5: Solve for x
   x = 72,555,271.72/8,580.34
6. Step 6: Final answer
   x = 8,455.99