Finding the Fourth Proportional to 2,175.50, 3,264.24 and 876.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.50 : 3,264.24 = 876.72 : x
2. Step 2: Convert to fraction form
   2,175.50/3,264.24 = 876.72/x
3. Step 3: Cross multiply
   2,175.50x = 3,264.24 × 876.72
4. Step 4: Simplify right side
   2,175.50x = 2,861,824.49
5. Step 5: Solve for x
   x = 2,861,824.49/2,175.50
6. Step 6: Final answer
   x = 1,315.48