Finding the Fourth Proportional to 1,491.72, 2,058.52 and 828.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.72 : 2,058.52 = 828.52 : x
2. Step 2: Convert to fraction form
   1,491.72/2,058.52 = 828.52/x
3. Step 3: Cross multiply
   1,491.72x = 2,058.52 × 828.52
4. Step 4: Simplify right side
   1,491.72x = 1,705,524.99
5. Step 5: Solve for x
   x = 1,705,524.99/1,491.72
6. Step 6: Final answer
   x = 1,143.33