Finding the Fourth Proportional to 2,621.17, 3,929.95 and 976.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.17 : 3,929.95 = 976.82 : x
2. Step 2: Convert to fraction form
   2,621.17/3,929.95 = 976.82/x
3. Step 3: Cross multiply
   2,621.17x = 3,929.95 × 976.82
4. Step 4: Simplify right side
   2,621.17x = 3,838,848.87
5. Step 5: Solve for x
   x = 3,838,848.87/2,621.17
6. Step 6: Final answer
   x = 1,464.56