Finding the Fourth Proportional to 2,719.13, 4,078.69 and 667.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,719.13 : 4,078.69 = 667.13 : x
2. Step 2: Convert to fraction form
   2,719.13/4,078.69 = 667.13/x
3. Step 3: Cross multiply
   2,719.13x = 4,078.69 × 667.13
4. Step 4: Simplify right side
   2,719.13x = 2,721,016.46
5. Step 5: Solve for x
   x = 2,721,016.46/2,719.13
6. Step 6: Final answer
   x = 1,000.69