Finding the Fourth Proportional to 11,957.86, 16,497.39 and 7,479.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,957.86 : 16,497.39 = 7,479.91 : x
2. Step 2: Convert to fraction form
   11,957.86/16,497.39 = 7,479.91/x
3. Step 3: Cross multiply
   11,957.86x = 16,497.39 × 7,479.91
4. Step 4: Simplify right side
   11,957.86x = 123,398,992.43
5. Step 5: Solve for x
   x = 123,398,992.43/11,957.86
6. Step 6: Final answer
   x = 10,319.49