Finding the Fourth Proportional to 2,621.97, 3,932.52 and 978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.97 : 3,932.52 = 978.08 : x
2. Step 2: Convert to fraction form
   2,621.97/3,932.52 = 978.08/x
3. Step 3: Cross multiply
   2,621.97x = 3,932.52 × 978.08
4. Step 4: Simplify right side
   2,621.97x = 3,846,319.16
5. Step 5: Solve for x
   x = 3,846,319.16/2,621.97
6. Step 6: Final answer
   x = 1,466.96