Finding the Fourth Proportional to 12,871.04, 17,776.56 and 8,672

Step by Step Solution

1. Step 1: Write the proportion equation
   12,871.04 : 17,776.56 = 8,672 : x
2. Step 2: Convert to fraction form
   12,871.04/17,776.56 = 8,672/x
3. Step 3: Cross multiply
   12,871.04x = 17,776.56 × 8,672
4. Step 4: Simplify right side
   12,871.04x = 154,158,328.32
5. Step 5: Solve for x
   x = 154,158,328.32/12,871.04
6. Step 6: Final answer
   x = 11,977.15