Finding the Fourth Proportional to 1,429.74, 2,143.59 and 551.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.74 : 2,143.59 = 551.49 : x
2. Step 2: Convert to fraction form
   1,429.74/2,143.59 = 551.49/x
3. Step 3: Cross multiply
   1,429.74x = 2,143.59 × 551.49
4. Step 4: Simplify right side
   1,429.74x = 1,182,168.45
5. Step 5: Solve for x
   x = 1,182,168.45/1,429.74
6. Step 6: Final answer
   x = 826.84