Finding the Fourth Proportional to 1,615.37, 2,228.60 and 985.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.37 : 2,228.60 = 985.46 : x
2. Step 2: Convert to fraction form
   1,615.37/2,228.60 = 985.46/x
3. Step 3: Cross multiply
   1,615.37x = 2,228.60 × 985.46
4. Step 4: Simplify right side
   1,615.37x = 2,196,180.09
5. Step 5: Solve for x
   x = 2,196,180.09/1,615.37
6. Step 6: Final answer
   x = 1,359.56