Finding the Fourth Proportional to 2,826.81, 4,241.24 and 978.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.81 : 4,241.24 = 978.11 : x
2. Step 2: Convert to fraction form
   2,826.81/4,241.24 = 978.11/x
3. Step 3: Cross multiply
   2,826.81x = 4,241.24 × 978.11
4. Step 4: Simplify right side
   2,826.81x = 4,148,412.30
5. Step 5: Solve for x
   x = 4,148,412.30/2,826.81
6. Step 6: Final answer
   x = 1,467.52