Finding the Fourth Proportional to 1,404.68, 2,107.47 and 674.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.68 : 2,107.47 = 674.31 : x
2. Step 2: Convert to fraction form
   1,404.68/2,107.47 = 674.31/x
3. Step 3: Cross multiply
   1,404.68x = 2,107.47 × 674.31
4. Step 4: Simplify right side
   1,404.68x = 1,421,088.10
5. Step 5: Solve for x
   x = 1,421,088.10/1,404.68
6. Step 6: Final answer
   x = 1,011.68