Finding the Fourth Proportional to 2,667.18, 4,000.87 and 719.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.18 : 4,000.87 = 719.43 : x
2. Step 2: Convert to fraction form
   2,667.18/4,000.87 = 719.43/x
3. Step 3: Cross multiply
   2,667.18x = 4,000.87 × 719.43
4. Step 4: Simplify right side
   2,667.18x = 2,878,345.90
5. Step 5: Solve for x
   x = 2,878,345.90/2,667.18
6. Step 6: Final answer
   x = 1,079.17