Finding the Fourth Proportional to 2,621.54, 3,934.37 and 978.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.54 : 3,934.37 = 978.19 : x
2. Step 2: Convert to fraction form
   2,621.54/3,934.37 = 978.19/x
3. Step 3: Cross multiply
   2,621.54x = 3,934.37 × 978.19
4. Step 4: Simplify right side
   2,621.54x = 3,848,546.66
5. Step 5: Solve for x
   x = 3,848,546.66/2,621.54
6. Step 6: Final answer
   x = 1,468.05