Finding the Fourth Proportional to 1,764.48, 2,434.78 and 978.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.48 : 2,434.78 = 978.51 : x
2. Step 2: Convert to fraction form
   1,764.48/2,434.78 = 978.51/x
3. Step 3: Cross multiply
   1,764.48x = 2,434.78 × 978.51
4. Step 4: Simplify right side
   1,764.48x = 2,382,456.58
5. Step 5: Solve for x
   x = 2,382,456.58/1,764.48
6. Step 6: Final answer
   x = 1,350.23