Finding the Fourth Proportional to 2,980.78, 4,113.45 and 1,722.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.78 : 4,113.45 = 1,722.10 : x
2. Step 2: Convert to fraction form
   2,980.78/4,113.45 = 1,722.10/x
3. Step 3: Cross multiply
   2,980.78x = 4,113.45 × 1,722.10
4. Step 4: Simplify right side
   2,980.78x = 7,083,772.25
5. Step 5: Solve for x
   x = 7,083,772.25/2,980.78
6. Step 6: Final answer
   x = 2,376.48