Finding the Fourth Proportional to 2,691.72, 4,032.72 and 1,391.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,691.72 : 4,032.72 = 1,391.67 : x
2. Step 2: Convert to fraction form
   2,691.72/4,032.72 = 1,391.67/x
3. Step 3: Cross multiply
   2,691.72x = 4,032.72 × 1,391.67
4. Step 4: Simplify right side
   2,691.72x = 5,612,215.44
5. Step 5: Solve for x
   x = 5,612,215.44/2,691.72
6. Step 6: Final answer
   x = 2,084.99