Finding the Fourth Proportional to 2,621.69, 3,933.22 and 978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.69 : 3,933.22 = 978.25 : x
2. Step 2: Convert to fraction form
   2,621.69/3,933.22 = 978.25/x
3. Step 3: Cross multiply
   2,621.69x = 3,933.22 × 978.25
4. Step 4: Simplify right side
   2,621.69x = 3,847,670.02
5. Step 5: Solve for x
   x = 3,847,670.02/2,621.69
6. Step 6: Final answer
   x = 1,467.63