Finding the Fourth Proportional to 1,404.72, 2,107.14 and 378.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.72 : 2,107.14 = 378.72 : x
2. Step 2: Convert to fraction form
   1,404.72/2,107.14 = 378.72/x
3. Step 3: Cross multiply
   1,404.72x = 2,107.14 × 378.72
4. Step 4: Simplify right side
   1,404.72x = 798,016.06
5. Step 5: Solve for x
   x = 798,016.06/1,404.72
6. Step 6: Final answer
   x = 568.10