Finding the Fourth Proportional to 1,677.25, 2,314.88 and 978.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.25 : 2,314.88 = 978.49 : x
2. Step 2: Convert to fraction form
   1,677.25/2,314.88 = 978.49/x
3. Step 3: Cross multiply
   1,677.25x = 2,314.88 × 978.49
4. Step 4: Simplify right side
   1,677.25x = 2,265,086.93
5. Step 5: Solve for x
   x = 2,265,086.93/1,677.25
6. Step 6: Final answer
   x = 1,350.48