Finding the Fourth Proportional to 1,429.40, 2,145.34 and 814.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.40 : 2,145.34 = 814.34 : x
2. Step 2: Convert to fraction form
   1,429.40/2,145.34 = 814.34/x
3. Step 3: Cross multiply
   1,429.40x = 2,145.34 × 814.34
4. Step 4: Simplify right side
   1,429.40x = 1,747,036.18
5. Step 5: Solve for x
   x = 1,747,036.18/1,429.40
6. Step 6: Final answer
   x = 1,222.22