Finding the Fourth Proportional to 2,276.90, 3,414.74 and 978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.90 : 3,414.74 = 978.06 : x
2. Step 2: Convert to fraction form
   2,276.90/3,414.74 = 978.06/x
3. Step 3: Cross multiply
   2,276.90x = 3,414.74 × 978.06
4. Step 4: Simplify right side
   2,276.90x = 3,339,820.60
5. Step 5: Solve for x
   x = 3,339,820.60/2,276.90
6. Step 6: Final answer
   x = 1,466.83