Finding the Fourth Proportional to 1,764.50, 2,434.89 and 978.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.50 : 2,434.89 = 978.59 : x
2. Step 2: Convert to fraction form
   1,764.50/2,434.89 = 978.59/x
3. Step 3: Cross multiply
   1,764.50x = 2,434.89 × 978.59
4. Step 4: Simplify right side
   1,764.50x = 2,382,768.76
5. Step 5: Solve for x
   x = 2,382,768.76/1,764.50
6. Step 6: Final answer
   x = 1,350.40