Finding the Fourth Proportional to 2,621.09, 3,929.15 and 976.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.09 : 3,929.15 = 976.51 : x
2. Step 2: Convert to fraction form
   2,621.09/3,929.15 = 976.51/x
3. Step 3: Cross multiply
   2,621.09x = 3,929.15 × 976.51
4. Step 4: Simplify right side
   2,621.09x = 3,836,849.38
5. Step 5: Solve for x
   x = 3,836,849.38/2,621.09
6. Step 6: Final answer
   x = 1,463.84