Finding the Fourth Proportional to 7,872.50, 10,863.71 and 4,287.47

Step by Step Solution

1. Step 1: Write the proportion equation
   7,872.50 : 10,863.71 = 4,287.47 : x
2. Step 2: Convert to fraction form
   7,872.50/10,863.71 = 4,287.47/x
3. Step 3: Cross multiply
   7,872.50x = 10,863.71 × 4,287.47
4. Step 4: Simplify right side
   7,872.50x = 46,577,754.96
5. Step 5: Solve for x
   x = 46,577,754.96/7,872.50
6. Step 6: Final answer
   x = 5,916.52