Finding the Fourth Proportional to 1,764.68, 2,435.25 and 978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.68 : 2,435.25 = 978.72 : x
2. Step 2: Convert to fraction form
   1,764.68/2,435.25 = 978.72/x
3. Step 3: Cross multiply
   1,764.68x = 2,435.25 × 978.72
4. Step 4: Simplify right side
   1,764.68x = 2,383,427.88
5. Step 5: Solve for x
   x = 2,383,427.88/1,764.68
6. Step 6: Final answer
   x = 1,350.63