Finding the Fourth Proportional to 1,764.76, 2,435.39 and 978.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.76 : 2,435.39 = 978.79 : x
2. Step 2: Convert to fraction form
   1,764.76/2,435.39 = 978.79/x
3. Step 3: Cross multiply
   1,764.76x = 2,435.39 × 978.79
4. Step 4: Simplify right side
   1,764.76x = 2,383,730.48
5. Step 5: Solve for x
   x = 2,383,730.48/1,764.76
6. Step 6: Final answer
   x = 1,350.74