Finding the Fourth Proportional to 1,774.82, 2,449.15 and 978.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,774.82 : 2,449.15 = 978.09 : x
2. Step 2: Convert to fraction form
   1,774.82/2,449.15 = 978.09/x
3. Step 3: Cross multiply
   1,774.82x = 2,449.15 × 978.09
4. Step 4: Simplify right side
   1,774.82x = 2,395,489.12
5. Step 5: Solve for x
   x = 2,395,489.12/1,774.82
6. Step 6: Final answer
   x = 1,349.71