Finding the Fourth Proportional to 1,677.22, 2,314.60 and 978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.22 : 2,314.60 = 978.58 : x
2. Step 2: Convert to fraction form
   1,677.22/2,314.60 = 978.58/x
3. Step 3: Cross multiply
   1,677.22x = 2,314.60 × 978.58
4. Step 4: Simplify right side
   1,677.22x = 2,265,021.27
5. Step 5: Solve for x
   x = 2,265,021.27/1,677.22
6. Step 6: Final answer
   x = 1,350.46