Finding the Fourth Proportional to 2,979.24, 4,111.34 and 1,720.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.24 : 4,111.34 = 1,720.28 : x
2. Step 2: Convert to fraction form
   2,979.24/4,111.34 = 1,720.28/x
3. Step 3: Cross multiply
   2,979.24x = 4,111.34 × 1,720.28
4. Step 4: Simplify right side
   2,979.24x = 7,072,626.82
5. Step 5: Solve for x
   x = 7,072,626.82/2,979.24
6. Step 6: Final answer
   x = 2,373.97