Finding the Fourth Proportional to 2,619.74, 3,929.20 and 976.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.74 : 3,929.20 = 976.05 : x
2. Step 2: Convert to fraction form
   2,619.74/3,929.20 = 976.05/x
3. Step 3: Cross multiply
   2,619.74x = 3,929.20 × 976.05
4. Step 4: Simplify right side
   2,619.74x = 3,835,093.22
5. Step 5: Solve for x
   x = 3,835,093.22/2,619.74
6. Step 6: Final answer
   x = 1,463.92