Finding the Fourth Proportional to 12,016.77, 16,581.15 and 6,981.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,016.77 : 16,581.15 = 6,981.81 : x
2. Step 2: Convert to fraction form
   12,016.77/16,581.15 = 6,981.81/x
3. Step 3: Cross multiply
   12,016.77x = 16,581.15 × 6,981.81
4. Step 4: Simplify right side
   12,016.77x = 115,766,438.88
5. Step 5: Solve for x
   x = 115,766,438.88/12,016.77
6. Step 6: Final answer
   x = 9,633.74