Finding the Fourth Proportional to 1,764.59, 2,435.09 and 978.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.59 : 2,435.09 = 978.62 : x
2. Step 2: Convert to fraction form
   1,764.59/2,435.09 = 978.62/x
3. Step 3: Cross multiply
   1,764.59x = 2,435.09 × 978.62
4. Step 4: Simplify right side
   1,764.59x = 2,383,010.71
5. Step 5: Solve for x
   x = 2,383,010.71/1,764.59
6. Step 6: Final answer
   x = 1,350.47