Finding the Fourth Proportional to 2,510.72, 3,464.70 and 1,391.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.72 : 3,464.70 = 1,391.67 : x
2. Step 2: Convert to fraction form
   2,510.72/3,464.70 = 1,391.67/x
3. Step 3: Cross multiply
   2,510.72x = 3,464.70 × 1,391.67
4. Step 4: Simplify right side
   2,510.72x = 4,821,726.82
5. Step 5: Solve for x
   x = 4,821,726.82/2,510.72
6. Step 6: Final answer
   x = 1,920.46