Finding the Fourth Proportional to 2,872.84, 3,961.38 and 1,939.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,872.84 : 3,961.38 = 1,939.72 : x
2. Step 2: Convert to fraction form
   2,872.84/3,961.38 = 1,939.72/x
3. Step 3: Cross multiply
   2,872.84x = 3,961.38 × 1,939.72
4. Step 4: Simplify right side
   2,872.84x = 7,683,968.01
5. Step 5: Solve for x
   x = 7,683,968.01/2,872.84
6. Step 6: Final answer
   x = 2,674.69