Finding the Fourth Proportional to 2,926.25, 4,388.88 and 978.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,926.25 : 4,388.88 = 978.44 : x
2. Step 2: Convert to fraction form
   2,926.25/4,388.88 = 978.44/x
3. Step 3: Cross multiply
   2,926.25x = 4,388.88 × 978.44
4. Step 4: Simplify right side
   2,926.25x = 4,294,266.72
5. Step 5: Solve for x
   x = 4,294,266.72/2,926.25
6. Step 6: Final answer
   x = 1,467.50