Finding the Fourth Proportional to 1,431.14, 2,145.69 and 700.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.14 : 2,145.69 = 700.25 : x
2. Step 2: Convert to fraction form
   1,431.14/2,145.69 = 700.25/x
3. Step 3: Cross multiply
   1,431.14x = 2,145.69 × 700.25
4. Step 4: Simplify right side
   1,431.14x = 1,502,508.69
5. Step 5: Solve for x
   x = 1,502,508.69/1,431.14
6. Step 6: Final answer
   x = 1,049.87