Finding the Fourth Proportional to 2,179.06, 3,007.17 and 1,247.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.06 : 3,007.17 = 1,247.86 : x
2. Step 2: Convert to fraction form
   2,179.06/3,007.17 = 1,247.86/x
3. Step 3: Cross multiply
   2,179.06x = 3,007.17 × 1,247.86
4. Step 4: Simplify right side
   2,179.06x = 3,752,527.16
5. Step 5: Solve for x
   x = 3,752,527.16/2,179.06
6. Step 6: Final answer
   x = 1,722.09