Finding the Fourth Proportional to 2,839.79, 3,919.02 and 1,720.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.79 : 3,919.02 = 1,720.10 : x
2. Step 2: Convert to fraction form
   2,839.79/3,919.02 = 1,720.10/x
3. Step 3: Cross multiply
   2,839.79x = 3,919.02 × 1,720.10
4. Step 4: Simplify right side
   2,839.79x = 6,741,086.71
5. Step 5: Solve for x
   x = 6,741,086.71/2,839.79
6. Step 6: Final answer
   x = 2,373.80