Finding the Fourth Proportional to 2,979.77, 4,112.72 and 1,721.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.77 : 4,112.72 = 1,721.03 : x
2. Step 2: Convert to fraction form
   2,979.77/4,112.72 = 1,721.03/x
3. Step 3: Cross multiply
   2,979.77x = 4,112.72 × 1,721.03
4. Step 4: Simplify right side
   2,979.77x = 7,078,085.33
5. Step 5: Solve for x
   x = 7,078,085.33/2,979.77
6. Step 6: Final answer
   x = 2,375.38