Finding the Fourth Proportional to 1,677.24, 2,314.83 and 978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.24 : 2,314.83 = 978.84 : x
2. Step 2: Convert to fraction form
   1,677.24/2,314.83 = 978.84/x
3. Step 3: Cross multiply
   1,677.24x = 2,314.83 × 978.84
4. Step 4: Simplify right side
   1,677.24x = 2,265,848.20
5. Step 5: Solve for x
   x = 2,265,848.20/1,677.24
6. Step 6: Final answer
   x = 1,350.94