Finding the Fourth Proportional to 2,671.67, 4,007.56 and 723.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.67 : 4,007.56 = 723.89 : x
2. Step 2: Convert to fraction form
   2,671.67/4,007.56 = 723.89/x
3. Step 3: Cross multiply
   2,671.67x = 4,007.56 × 723.89
4. Step 4: Simplify right side
   2,671.67x = 2,901,032.61
5. Step 5: Solve for x
   x = 2,901,032.61/2,671.67
6. Step 6: Final answer
   x = 1,085.85