Finding the Fourth Proportional to 2,926.32, 4,389.60 and 978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,926.32 : 4,389.60 = 978.54 : x
2. Step 2: Convert to fraction form
   2,926.32/4,389.60 = 978.54/x
3. Step 3: Cross multiply
   2,926.32x = 4,389.60 × 978.54
4. Step 4: Simplify right side
   2,926.32x = 4,295,399.18
5. Step 5: Solve for x
   x = 4,295,399.18/2,926.32
6. Step 6: Final answer
   x = 1,467.85