Finding the Fourth Proportional to 8,880.72, 13,328.76 and 3,412.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,880.72 : 13,328.76 = 3,412.56 : x
2. Step 2: Convert to fraction form
   8,880.72/13,328.76 = 3,412.56/x
3. Step 3: Cross multiply
   8,880.72x = 13,328.76 × 3,412.56
4. Step 4: Simplify right side
   8,880.72x = 45,485,193.23
5. Step 5: Solve for x
   x = 45,485,193.23/8,880.72
6. Step 6: Final answer
   x = 5,121.79