Finding the Fourth Proportional to 1,764.56, 2,435.19 and 978.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.56 : 2,435.19 = 978.59 : x
2. Step 2: Convert to fraction form
   1,764.56/2,435.19 = 978.59/x
3. Step 3: Cross multiply
   1,764.56x = 2,435.19 × 978.59
4. Step 4: Simplify right side
   1,764.56x = 2,383,052.58
5. Step 5: Solve for x
   x = 2,383,052.58/1,764.56
6. Step 6: Final answer
   x = 1,350.51