Finding the Fourth Proportional to 12,718.69, 19,080.16 and 3,951.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,718.69 : 19,080.16 = 3,951.86 : x
2. Step 2: Convert to fraction form
   12,718.69/19,080.16 = 3,951.86/x
3. Step 3: Cross multiply
   12,718.69x = 19,080.16 × 3,951.86
4. Step 4: Simplify right side
   12,718.69x = 75,402,015.82
5. Step 5: Solve for x
   x = 75,402,015.82/12,718.69
6. Step 6: Final answer
   x = 5,928.44