Finding the Fourth Proportional to 2,667.50, 4,000.62 and 719.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.50 : 4,000.62 = 719.86 : x
2. Step 2: Convert to fraction form
   2,667.50/4,000.62 = 719.86/x
3. Step 3: Cross multiply
   2,667.50x = 4,000.62 × 719.86
4. Step 4: Simplify right side
   2,667.50x = 2,879,886.31
5. Step 5: Solve for x
   x = 2,879,886.31/2,667.50
6. Step 6: Final answer
   x = 1,079.62