Finding the Fourth Proportional to 2,382.94, 3,574.43 and 978.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.94 : 3,574.43 = 978.13 : x
2. Step 2: Convert to fraction form
   2,382.94/3,574.43 = 978.13/x
3. Step 3: Cross multiply
   2,382.94x = 3,574.43 × 978.13
4. Step 4: Simplify right side
   2,382.94x = 3,496,243.39
5. Step 5: Solve for x
   x = 3,496,243.39/2,382.94
6. Step 6: Final answer
   x = 1,467.20