Finding the Fourth Proportional to 10,513.16, 15,768.52 and 2,721.36

Step by Step Solution

1. Step 1: Write the proportion equation
   10,513.16 : 15,768.52 = 2,721.36 : x
2. Step 2: Convert to fraction form
   10,513.16/15,768.52 = 2,721.36/x
3. Step 3: Cross multiply
   10,513.16x = 15,768.52 × 2,721.36
4. Step 4: Simplify right side
   10,513.16x = 42,911,819.59
5. Step 5: Solve for x
   x = 42,911,819.59/10,513.16
6. Step 6: Final answer
   x = 4,081.72