Finding the Fourth Proportional to 1,429.98, 2,143.74 and 814.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.98 : 2,143.74 = 814.59 : x
2. Step 2: Convert to fraction form
   1,429.98/2,143.74 = 814.59/x
3. Step 3: Cross multiply
   1,429.98x = 2,143.74 × 814.59
4. Step 4: Simplify right side
   1,429.98x = 1,746,269.17
5. Step 5: Solve for x
   x = 1,746,269.17/1,429.98
6. Step 6: Final answer
   x = 1,221.18