Finding the Fourth Proportional to 2,623.25, 3,932.54 and 978.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.25 : 3,932.54 = 978.68 : x
2. Step 2: Convert to fraction form
   2,623.25/3,932.54 = 978.68/x
3. Step 3: Cross multiply
   2,623.25x = 3,932.54 × 978.68
4. Step 4: Simplify right side
   2,623.25x = 3,848,698.25
5. Step 5: Solve for x
   x = 3,848,698.25/2,623.25
6. Step 6: Final answer
   x = 1,467.15