Finding the Fourth Proportional to 2,276.70, 3,415.25 and 978.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.70 : 3,415.25 = 978.27 : x
2. Step 2: Convert to fraction form
   2,276.70/3,415.25 = 978.27/x
3. Step 3: Cross multiply
   2,276.70x = 3,415.25 × 978.27
4. Step 4: Simplify right side
   2,276.70x = 3,341,036.62
5. Step 5: Solve for x
   x = 3,341,036.62/2,276.70
6. Step 6: Final answer
   x = 1,467.49