Finding the Fourth Proportional to 10,991.82, 16,477.86 and 3,966.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.82 : 16,477.86 = 3,966.96 : x
2. Step 2: Convert to fraction form
   10,991.82/16,477.86 = 3,966.96/x
3. Step 3: Cross multiply
   10,991.82x = 16,477.86 × 3,966.96
4. Step 4: Simplify right side
   10,991.82x = 65,367,011.51
5. Step 5: Solve for x
   x = 65,367,011.51/10,991.82
6. Step 6: Final answer
   x = 5,946.88