Finding the Fourth Proportional to 2,978.43, 4,109.28 and 1,719.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.43 : 4,109.28 = 1,719.32 : x
2. Step 2: Convert to fraction form
   2,978.43/4,109.28 = 1,719.32/x
3. Step 3: Cross multiply
   2,978.43x = 4,109.28 × 1,719.32
4. Step 4: Simplify right side
   2,978.43x = 7,065,146.74
5. Step 5: Solve for x
   x = 7,065,146.74/2,978.43
6. Step 6: Final answer
   x = 2,372.10