Finding the Fourth Proportional to 2,980.01, 4,112.61 and 1,721.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.01 : 4,112.61 = 1,721.12 : x
2. Step 2: Convert to fraction form
   2,980.01/4,112.61 = 1,721.12/x
3. Step 3: Cross multiply
   2,980.01x = 4,112.61 × 1,721.12
4. Step 4: Simplify right side
   2,980.01x = 7,078,266.15
5. Step 5: Solve for x
   x = 7,078,266.15/2,980.01
6. Step 6: Final answer
   x = 2,375.25