Finding the Fourth Proportional to 2,380.16, 3,567.78 and 994.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.16 : 3,567.78 = 994.31 : x
2. Step 2: Convert to fraction form
   2,380.16/3,567.78 = 994.31/x
3. Step 3: Cross multiply
   2,380.16x = 3,567.78 × 994.31
4. Step 4: Simplify right side
   2,380.16x = 3,547,461.49
5. Step 5: Solve for x
   x = 3,547,461.49/2,380.16
6. Step 6: Final answer
   x = 1,490.43