Finding the Fourth Proportional to 2,621.22, 3,930.47 and 976.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.22 : 3,930.47 = 976.42 : x
2. Step 2: Convert to fraction form
   2,621.22/3,930.47 = 976.42/x
3. Step 3: Cross multiply
   2,621.22x = 3,930.47 × 976.42
4. Step 4: Simplify right side
   2,621.22x = 3,837,774.81
5. Step 5: Solve for x
   x = 3,837,774.81/2,621.22
6. Step 6: Final answer
   x = 1,464.12