Finding the Fourth Proportional to 2,978.10, 4,109.72 and 1,719.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.10 : 4,109.72 = 1,719.15 : x
2. Step 2: Convert to fraction form
   2,978.10/4,109.72 = 1,719.15/x
3. Step 3: Cross multiply
   2,978.10x = 4,109.72 × 1,719.15
4. Step 4: Simplify right side
   2,978.10x = 7,065,216.54
5. Step 5: Solve for x
   x = 7,065,216.54/2,978.10
6. Step 6: Final answer
   x = 2,372.39