Finding the Fourth Proportional to 1,348.52, 2,018.20 and 828.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.52 : 2,018.20 = 828.25 : x
2. Step 2: Convert to fraction form
   1,348.52/2,018.20 = 828.25/x
3. Step 3: Cross multiply
   1,348.52x = 2,018.20 × 828.25
4. Step 4: Simplify right side
   1,348.52x = 1,671,577.76
5. Step 5: Solve for x
   x = 1,671,577.76/1,348.52
6. Step 6: Final answer
   x = 1,239.56