Finding the Fourth Proportional to 2,120.07, 3,176.72 and 1,339.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.07 : 3,176.72 = 1,339.94 : x
2. Step 2: Convert to fraction form
   2,120.07/3,176.72 = 1,339.94/x
3. Step 3: Cross multiply
   2,120.07x = 3,176.72 × 1,339.94
4. Step 4: Simplify right side
   2,120.07x = 4,256,620.46
5. Step 5: Solve for x
   x = 4,256,620.46/2,120.07
6. Step 6: Final answer
   x = 2,007.77