Finding the Fourth Proportional to 1,764.25, 2,434.67 and 978.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.25 : 2,434.67 = 978.35 : x
2. Step 2: Convert to fraction form
   1,764.25/2,434.67 = 978.35/x
3. Step 3: Cross multiply
   1,764.25x = 2,434.67 × 978.35
4. Step 4: Simplify right side
   1,764.25x = 2,381,959.39
5. Step 5: Solve for x
   x = 2,381,959.39/1,764.25
6. Step 6: Final answer
   x = 1,350.13