Finding the Fourth Proportional to 1,039.34, 1,557.63 and 551.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.34 : 1,557.63 = 551.34 : x
2. Step 2: Convert to fraction form
   1,039.34/1,557.63 = 551.34/x
3. Step 3: Cross multiply
   1,039.34x = 1,557.63 × 551.34
4. Step 4: Simplify right side
   1,039.34x = 858,783.72
5. Step 5: Solve for x
   x = 858,783.72/1,039.34
6. Step 6: Final answer
   x = 826.28