Finding the Fourth Proportional to 1,491.83, 2,058.72 and 828.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.83 : 2,058.72 = 828.69 : x
2. Step 2: Convert to fraction form
   1,491.83/2,058.72 = 828.69/x
3. Step 3: Cross multiply
   1,491.83x = 2,058.72 × 828.69
4. Step 4: Simplify right side
   1,491.83x = 1,706,040.68
5. Step 5: Solve for x
   x = 1,706,040.68/1,491.83
6. Step 6: Final answer
   x = 1,143.59