Finding the Fourth Proportional to 1,677.32, 2,314.62 and 978.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.32 : 2,314.62 = 978.68 : x
2. Step 2: Convert to fraction form
   1,677.32/2,314.62 = 978.68/x
3. Step 3: Cross multiply
   1,677.32x = 2,314.62 × 978.68
4. Step 4: Simplify right side
   1,677.32x = 2,265,272.30
5. Step 5: Solve for x
   x = 2,265,272.30/1,677.32
6. Step 6: Final answer
   x = 1,350.53