Finding the Fourth Proportional to 2,667.12, 4,000.12 and 719.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.12 : 4,000.12 = 719.34 : x
2. Step 2: Convert to fraction form
   2,667.12/4,000.12 = 719.34/x
3. Step 3: Cross multiply
   2,667.12x = 4,000.12 × 719.34
4. Step 4: Simplify right side
   2,667.12x = 2,877,446.32
5. Step 5: Solve for x
   x = 2,877,446.32/2,667.12
6. Step 6: Final answer
   x = 1,078.86