Finding the Fourth Proportional to 3,443.22, 5,164.74 and 978.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.22 : 5,164.74 = 978.21 : x
2. Step 2: Convert to fraction form
   3,443.22/5,164.74 = 978.21/x
3. Step 3: Cross multiply
   3,443.22x = 5,164.74 × 978.21
4. Step 4: Simplify right side
   3,443.22x = 5,052,200.32
5. Step 5: Solve for x
   x = 5,052,200.32/3,443.22
6. Step 6: Final answer
   x = 1,467.29