Finding the Fourth Proportional to 10,272.72, 15,411.69 and 2,877.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,272.72 : 15,411.69 = 2,877.21 : x
2. Step 2: Convert to fraction form
   10,272.72/15,411.69 = 2,877.21/x
3. Step 3: Cross multiply
   10,272.72x = 15,411.69 × 2,877.21
4. Step 4: Simplify right side
   10,272.72x = 44,342,668.58
5. Step 5: Solve for x
   x = 44,342,668.58/10,272.72
6. Step 6: Final answer
   x = 4,316.55