Finding the Fourth Proportional to 8,424.32, 12,638.90 and 2,581.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,424.32 : 12,638.90 = 2,581.79 : x
2. Step 2: Convert to fraction form
   8,424.32/12,638.90 = 2,581.79/x
3. Step 3: Cross multiply
   8,424.32x = 12,638.90 × 2,581.79
4. Step 4: Simplify right side
   8,424.32x = 32,630,928.89
5. Step 5: Solve for x
   x = 32,630,928.89/8,424.32
6. Step 6: Final answer
   x = 3,873.42