Finding the Fourth Proportional to 1,764.37, 2,434.72 and 978.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.37 : 2,434.72 = 978.43 : x
2. Step 2: Convert to fraction form
   1,764.37/2,434.72 = 978.43/x
3. Step 3: Cross multiply
   1,764.37x = 2,434.72 × 978.43
4. Step 4: Simplify right side
   1,764.37x = 2,382,203.09
5. Step 5: Solve for x
   x = 2,382,203.09/1,764.37
6. Step 6: Final answer
   x = 1,350.17