Finding the Fourth Proportional to 2,619.80, 3,929.89 and 976.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.80 : 3,929.89 = 976.34 : x
2. Step 2: Convert to fraction form
   2,619.80/3,929.89 = 976.34/x
3. Step 3: Cross multiply
   2,619.80x = 3,929.89 × 976.34
4. Step 4: Simplify right side
   2,619.80x = 3,836,908.80
5. Step 5: Solve for x
   x = 3,836,908.80/2,619.80
6. Step 6: Final answer
   x = 1,464.58