Finding the Fourth Proportional to 1,578.83, 2,371.38 and 994.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578.83 : 2,371.38 = 994.21 : x
2. Step 2: Convert to fraction form
   1,578.83/2,371.38 = 994.21/x
3. Step 3: Cross multiply
   1,578.83x = 2,371.38 × 994.21
4. Step 4: Simplify right side
   1,578.83x = 2,357,640.05
5. Step 5: Solve for x
   x = 2,357,640.05/1,578.83
6. Step 6: Final answer
   x = 1,493.29