Finding the Fourth Proportional to 11,957.69, 16,502.15 and 9,964.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,957.69 : 16,502.15 = 9,964.91 : x
2. Step 2: Convert to fraction form
   11,957.69/16,502.15 = 9,964.91/x
3. Step 3: Cross multiply
   11,957.69x = 16,502.15 × 9,964.91
4. Step 4: Simplify right side
   11,957.69x = 164,442,439.56
5. Step 5: Solve for x
   x = 164,442,439.56/11,957.69
6. Step 6: Final answer
   x = 13,752.02