Finding the Fourth Proportional to 1,404.12, 2,105.94 and 378.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.12 : 2,105.94 = 378.12 : x
2. Step 2: Convert to fraction form
   1,404.12/2,105.94 = 378.12/x
3. Step 3: Cross multiply
   1,404.12x = 2,105.94 × 378.12
4. Step 4: Simplify right side
   1,404.12x = 796,298.03
5. Step 5: Solve for x
   x = 796,298.03/1,404.12
6. Step 6: Final answer
   x = 567.12