Finding the Fourth Proportional to 8,580.72, 12,871.20 and 2,424.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,580.72 : 12,871.20 = 2,424.72 : x
2. Step 2: Convert to fraction form
   8,580.72/12,871.20 = 2,424.72/x
3. Step 3: Cross multiply
   8,580.72x = 12,871.20 × 2,424.72
4. Step 4: Simplify right side
   8,580.72x = 31,209,056.06
5. Step 5: Solve for x
   x = 31,209,056.06/8,580.72
6. Step 6: Final answer
   x = 3,637.11