Finding the Fourth Proportional to 1,984.38, 2,978.33 and 1,107.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,984.38 : 2,978.33 = 1,107.56 : x
2. Step 2: Convert to fraction form
   1,984.38/2,978.33 = 1,107.56/x
3. Step 3: Cross multiply
   1,984.38x = 2,978.33 × 1,107.56
4. Step 4: Simplify right side
   1,984.38x = 3,298,658.75
5. Step 5: Solve for x
   x = 3,298,658.75/1,984.38
6. Step 6: Final answer
   x = 1,662.31