Finding the Fourth Proportional to 2,176.72, 3,264.72 and 715.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.72 : 3,264.72 = 715.89 : x
2. Step 2: Convert to fraction form
   2,176.72/3,264.72 = 715.89/x
3. Step 3: Cross multiply
   2,176.72x = 3,264.72 × 715.89
4. Step 4: Simplify right side
   2,176.72x = 2,337,180.40
5. Step 5: Solve for x
   x = 2,337,180.40/2,176.72
6. Step 6: Final answer
   x = 1,073.72