Finding the Fourth Proportional to 2,978.16, 4,109.52 and 1,719.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.16 : 4,109.52 = 1,719.21 : x
2. Step 2: Convert to fraction form
   2,978.16/4,109.52 = 1,719.21/x
3. Step 3: Cross multiply
   2,978.16x = 4,109.52 × 1,719.21
4. Step 4: Simplify right side
   2,978.16x = 7,065,127.88
5. Step 5: Solve for x
   x = 7,065,127.88/2,978.16
6. Step 6: Final answer
   x = 2,372.31