Finding the Fourth Proportional to 1,483.17, 2,223.67 and 857.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.17 : 2,223.67 = 857.59 : x
2. Step 2: Convert to fraction form
   1,483.17/2,223.67 = 857.59/x
3. Step 3: Cross multiply
   1,483.17x = 2,223.67 × 857.59
4. Step 4: Simplify right side
   1,483.17x = 1,906,991.06
5. Step 5: Solve for x
   x = 1,906,991.06/1,483.17
6. Step 6: Final answer
   x = 1,285.75