Finding the Fourth Proportional to 2,276.96, 3,414.81 and 978.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.96 : 3,414.81 = 978.13 : x
2. Step 2: Convert to fraction form
   2,276.96/3,414.81 = 978.13/x
3. Step 3: Cross multiply
   2,276.96x = 3,414.81 × 978.13
4. Step 4: Simplify right side
   2,276.96x = 3,340,128.11
5. Step 5: Solve for x
   x = 3,340,128.11/2,276.96
6. Step 6: Final answer
   x = 1,466.92