Finding the Fourth Proportional to 1,677.44, 2,314.24 and 978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.44 : 2,314.24 = 978.56 : x
2. Step 2: Convert to fraction form
   1,677.44/2,314.24 = 978.56/x
3. Step 3: Cross multiply
   1,677.44x = 2,314.24 × 978.56
4. Step 4: Simplify right side
   1,677.44x = 2,264,622.69
5. Step 5: Solve for x
   x = 2,264,622.69/1,677.44
6. Step 6: Final answer
   x = 1,350.05