Finding the Fourth Proportional to 1,357.35, 1,872.88 and 826.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.35 : 1,872.88 = 826.09 : x
2. Step 2: Convert to fraction form
   1,357.35/1,872.88 = 826.09/x
3. Step 3: Cross multiply
   1,357.35x = 1,872.88 × 826.09
4. Step 4: Simplify right side
   1,357.35x = 1,547,167.44
5. Step 5: Solve for x
   x = 1,547,167.44/1,357.35
6. Step 6: Final answer
   x = 1,139.84