Finding the Fourth Proportional to 1,764.42, 2,434.74 and 978.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.42 : 2,434.74 = 978.48 : x
2. Step 2: Convert to fraction form
   1,764.42/2,434.74 = 978.48/x
3. Step 3: Cross multiply
   1,764.42x = 2,434.74 × 978.48
4. Step 4: Simplify right side
   1,764.42x = 2,382,344.40
5. Step 5: Solve for x
   x = 2,382,344.40/1,764.42
6. Step 6: Final answer
   x = 1,350.21