Finding the Fourth Proportional to 2,872.34, 3,960.69 and 1,939.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,872.34 : 3,960.69 = 1,939.22 : x
2. Step 2: Convert to fraction form
   2,872.34/3,960.69 = 1,939.22/x
3. Step 3: Cross multiply
   2,872.34x = 3,960.69 × 1,939.22
4. Step 4: Simplify right side
   2,872.34x = 7,680,649.26
5. Step 5: Solve for x
   x = 7,680,649.26/2,872.34
6. Step 6: Final answer
   x = 2,674.00