Finding the Fourth Proportional to 2,979.53, 4,111.78 and 1,720.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.53 : 4,111.78 = 1,720.59 : x
2. Step 2: Convert to fraction form
   2,979.53/4,111.78 = 1,720.59/x
3. Step 3: Cross multiply
   2,979.53x = 4,111.78 × 1,720.59
4. Step 4: Simplify right side
   2,979.53x = 7,074,694.18
5. Step 5: Solve for x
   x = 7,074,694.18/2,979.53
6. Step 6: Final answer
   x = 2,374.43